{
 "schema_version": "0.1",
 "site": "nih.gov",
 "scan_week": "2026-W29",
 "generated_at": "2026-09-30T18:09:55.680Z",
 "source_files": [
  "docs/reports/nih.gov/2026-W29/",
  "data/nih.gov/findings.json",
  "data/nih.gov/2026-W29/summary.json"
 ],
 "summary": {
  "pages_known": 4818,
  "pages_scanned_this_week": 3333,
  "pages_with_known_issues": 45,
  "findings": 35,
  "clusters": 30,
  "new_findings": 1,
  "persistent_findings": 30,
  "high_priority_findings": 23
 },
 "top_risks": [
  {
   "finding_id": "VS-8ade3360",
   "rule_id": "link-in-text-block",
   "rule_label": "Links must be distinguishable without relying on color",
   "severity": "Critical",
   "priority": "p1",
   "trend": "worsening",
   "pages_affected": 3133,
   "rationale": "Critical severity; affects 3133 pages; worsening trend",
   "top_url": "https://www.nih.gov/challenges/nih-complement-animal-research-experimentation-nams-reduction-practice-challenge"
  },
  {
   "finding_id": "VS-f18df681",
   "rule_id": "region",
   "rule_label": "All page content should be contained by landmarks",
   "severity": "Serious",
   "priority": "p1",
   "trend": "persistent",
   "pages_affected": 3122,
   "rationale": "Serious severity; affects 3122 pages; persistent across weeks",
   "top_url": "https://www.nih.gov/challenges/nih-complement-animal-research-experimentation-nams-reduction-practice-challenge"
  },
  {
   "finding_id": "VS-d25f622d",
   "rule_id": "heading-order",
   "rule_label": "Heading levels should only increase by one",
   "severity": "Serious",
   "priority": "p1",
   "trend": "improving",
   "pages_affected": 2300,
   "rationale": "Serious severity; affects 2300 pages",
   "top_url": "https://www.nih.gov/challenges/nih-complement-animal-research-experimentation-nams-reduction-practice-challenge"
  },
  {
   "finding_id": "VS-a0bdbdf6",
   "rule_id": "list",
   "rule_label": "<ul> and <ol> must only directly contain <li>, <script> or <template> elements",
   "severity": "Serious",
   "priority": "p1",
   "trend": "persistent",
   "pages_affected": 104,
   "rationale": "Serious severity; affects 104 pages; persistent across weeks",
   "top_url": "https://www.nih.gov/heal/award-policy/data-sharing-policy/common-data-elements-cdes-repository?page=14"
  },
  {
   "finding_id": "VS-9074b4dd",
   "rule_id": "image-alt",
   "rule_label": "Images must have alternative text",
   "severity": "Critical",
   "priority": "p1",
   "trend": "persistent",
   "pages_affected": 50,
   "rationale": "Critical severity; persistent across weeks",
   "top_url": "https://nih.gov/news-events/nih-research-matters/2024-nih-research-highlights-human-health-advances"
  },
  {
   "finding_id": "VS-1467ea8a",
   "rule_id": "aria-allowed-attr",
   "rule_label": "Elements must only use supported ARIA attributes",
   "severity": "Critical",
   "priority": "p1",
   "trend": "persistent",
   "pages_affected": 28,
   "rationale": "Critical severity; persistent across weeks",
   "top_url": "https://www.nih.gov/challenges/nih-complement-animal-research-experimentation-nams-reduction-practice-challenge"
  },
  {
   "finding_id": "VS-e9fe47ac",
   "rule_id": "link-name",
   "rule_label": "Links must have discernible text",
   "severity": "Serious",
   "priority": "p1",
   "trend": "persistent",
   "pages_affected": 26,
   "rationale": "Serious severity; persistent across weeks",
   "top_url": "https://www.nih.gov/challenges/nih-complement-animal-research-experimentation-nams-reduction-practice-challenge"
  },
  {
   "finding_id": "VS-fafffee0",
   "rule_id": "label",
   "rule_label": "Form elements must have labels",
   "severity": "Critical",
   "priority": "p1",
   "trend": "persistent",
   "pages_affected": 24,
   "rationale": "Critical severity; persistent across weeks",
   "top_url": "https://nih.gov/news-events/news-releases?page=181"
  },
  {
   "finding_id": "VS-dd1c019f",
   "rule_id": "valid-lang",
   "rule_label": "lang attribute must have a valid value",
   "severity": "Serious",
   "priority": "p1",
   "trend": "persistent",
   "pages_affected": 20,
   "rationale": "Serious severity; persistent across weeks",
   "top_url": "https://www.nih.gov/institutes-nih/nih-office-director/office-communications-public-liaison/public-affairs"
  },
  {
   "finding_id": "VS-be8d563e",
   "rule_id": "color-contrast",
   "rule_label": "Elements must meet minimum color contrast ratio thresholds",
   "severity": "Serious",
   "priority": "p1",
   "trend": "persistent",
   "pages_affected": 12,
   "rationale": "Serious severity; persistent across weeks",
   "top_url": "https://www.nih.gov/nih-blueprint-neuroscience-research/research-tools"
  }
 ],
 "findings": [
  {
   "finding_id": "VS-8ade3360",
   "fingerprint": "8bf51706",
   "rule_id": "link-in-text-block",
   "rule_label": "Links must be distinguishable without relying on color",
   "engine": "axe-core",
   "tool": "axe-core",
   "wcag_sc": "1.4.1",
   "wcag_name": "Use of Color",
   "wcag_level": "A",
   "wcag_version": "2.0",
   "wcag_category": "WCAG 2.0 A",
   "rule_url": "https://dequeuniversity.com/rules/axe/4.12/link-in-text-block?application=axeAPI",
   "severity": "Critical",
   "priority": "p1",
   "confidence": "high",
   "rationale": "Critical severity; affects 3133 pages; worsening trend",
   "trend": {
    "status": "worsening",
    "first_observed": "2026-W25",
    "last_observed": "2026-W29",
    "weeks_observed": 5,
    "affected_pages_current": 3133,
    "affected_pages_previous": 22
   },
   "frequency": {
    "instances": 17561,
    "pages_affected": 3133,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Links must be distinguishable without relying on color (WCAG 1.4.1)",
   "description": "Links must be distinguishable without relying on color. Detected by axe-core rule link-in-text-block on 3133 of 3333 scanned pages (17561 instances).",
   "remediation_tip": null,
   "suggested_fix": "See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/link-in-text-block?application=axeAPI",
   "expected_behavior": "Element passes axe-core rule link-in-text-block (WCAG 1.4.1).",
   "actual_behavior": "Links must be distinguishable without relying on color. Detected by axe-core rule link-in-text-block on 3133 of 3333 scanned pages (17561 instances).",
   "testing_environment": "Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/challenges/nih-complement-animal-research-experimentation-nams-reduction-practice-challenge",
    "https://www.nih.gov/news-events/nih-research-matters/mrna-vaccine-treat-pancreatic-cancer",
    "https://www.nih.gov/about-nih/science-health-public-trust/checklist-communicating-science-health-research-public"
   ],
   "html_fragments": [
    {
     "fingerprint": "03b34766",
     "html": "<a href=\"https://www.challenge.gov/?challenge=complement-arie\" class=\"ext\" data-extlink=\"\" target=\"_blank\" rel=\"noopener nofollow noreferrer\" title=\"(opens in a new window)\">Complement-ARIE Ideation C",
     "selectors": [
      "p:nth-child(3) > a[title=\"(opens in a new window)\"][data-extlink=\"\"][rel=\"noopener nofollow noreferrer\"]"
     ]
    },
    {
     "fingerprint": "8fe39696",
     "html": "<a href=\"https://acd.od.nih.gov/working-groups/novel-alternatives.html\" class=\"ext\" data-extlink=\"\" target=\"_blank\" rel=\"noopener nofollow noreferrer\" title=\"(opens in a new window)\">",
     "selectors": [
      "a[title=\"(opens in a new window)\"][data-extlink=\"\"][rel=\"noopener nofollow noreferrer\"]:nth-child(3)"
     ]
    },
    {
     "fingerprint": "8ab71c06",
     "html": "<a href=\"https://commonfund.nih.gov/complementarie/strategicplanning\" class=\"ext\" data-extlink=\"\" target=\"_blank\" rel=\"noopener nofollow noreferrer\" title=\"(opens in a new window)\">Complement-ARIE str",
     "selectors": [
      "a[title=\"(opens in a new window)\"][data-extlink=\"\"][rel=\"noopener nofollow noreferrer\"]:nth-child(5)"
     ]
    }
   ],
   "url_patterns": [
    {
     "pattern": "/challenges/nih-complement-animal-research-experimentation-nams-reduction-practice-challenge",
     "count": 1
    },
    {
     "pattern": "/news-events/nih-research-matters/mrna-vaccine-treat-pancreatic-cancer",
     "count": 1
    },
    {
     "pattern": "/about-nih/science-health-public-trust/checklist-communicating-science-health-research-public",
     "count": 1
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [
     {
      "code": "WPC",
      "group": "Without color perception",
      "prevalence": 0.045,
      "percent": "4.5%",
      "estimatedExcluded": null
     },
     {
      "code": "LV",
      "group": "Limited vision",
      "prevalence": 0.024,
      "percent": "2.4%",
      "estimatedExcluded": null
     }
    ],
    "summary": "Affects Without color perception (4.5%), Limited vision (2.4%)."
   }
  },
  {
   "finding_id": "VS-f18df681",
   "fingerprint": "09987718",
   "rule_id": "region",
   "rule_label": "All page content should be contained by landmarks",
   "engine": "axe-core",
   "tool": "axe-core",
   "wcag_sc": null,
   "wcag_name": null,
   "wcag_level": null,
   "wcag_version": null,
   "wcag_category": "Best Practice",
   "rule_url": "https://dequeuniversity.com/rules/axe/4.12/region?application=axeAPI",
   "severity": "Serious",
   "priority": "p1",
   "confidence": "high",
   "rationale": "Serious severity; affects 3122 pages; persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W25",
    "last_observed": "2026-W29",
    "weeks_observed": 5,
    "affected_pages_current": 3122,
    "affected_pages_previous": 23
   },
   "frequency": {
    "instances": 4177,
    "pages_affected": 3122,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "All page content should be contained by landmarks (WCAG criterion undetermined)",
   "description": "All page content should be contained by landmarks. Detected by axe-core rule region on 3122 of 3333 scanned pages (4177 instances).",
   "remediation_tip": "Wrap all page content in landmarks (header, nav, main, footer) so users can navigate by region.",
   "suggested_fix": "See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/region?application=axeAPI",
   "expected_behavior": "Element passes axe-core rule region.",
   "actual_behavior": "All page content should be contained by landmarks. Detected by axe-core rule region on 3122 of 3333 scanned pages (4177 instances).",
   "testing_environment": "Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/challenges/nih-complement-animal-research-experimentation-nams-reduction-practice-challenge",
    "https://www.nih.gov/news-events/nih-research-matters/mrna-vaccine-treat-pancreatic-cancer",
    "https://www.nih.gov/about-nih/science-health-public-trust/checklist-communicating-science-health-research-public"
   ],
   "html_fragments": [
    {
     "fingerprint": "16269d5d",
     "html": "<h2 id=\"system-breadcrumb\" class=\"visually-hidden\">Breadcrumb</h2>",
     "selectors": [
      "#system-breadcrumb"
     ]
    }
   ],
   "url_patterns": [
    {
     "pattern": "/challenges/nih-complement-animal-research-experimentation-nams-reduction-practice-challenge",
     "count": 1
    },
    {
     "pattern": "/news-events/nih-research-matters/mrna-vaccine-treat-pancreatic-cancer",
     "count": 1
    },
    {
     "pattern": "/about-nih/science-health-public-trust/checklist-communicating-science-health-research-public",
     "count": 1
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [],
    "summary": "Not captured by automated scan — requires manual testing."
   }
  },
  {
   "finding_id": "VS-d25f622d",
   "fingerprint": "98ff321a",
   "rule_id": "heading-order",
   "rule_label": "Heading levels should only increase by one",
   "engine": "axe-core",
   "tool": "axe-core",
   "wcag_sc": null,
   "wcag_name": null,
   "wcag_level": null,
   "wcag_version": null,
   "wcag_category": "Best Practice",
   "rule_url": "https://dequeuniversity.com/rules/axe/4.12/heading-order?application=axeAPI",
   "severity": "Serious",
   "priority": "p1",
   "confidence": "high",
   "rationale": "Serious severity; affects 2300 pages",
   "trend": {
    "status": "improving",
    "first_observed": "2026-W25",
    "last_observed": "2026-W29",
    "weeks_observed": 3,
    "affected_pages_current": 2300,
    "affected_pages_previous": 19
   },
   "frequency": {
    "instances": 2442,
    "pages_affected": 2300,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Heading levels should only increase by one (WCAG criterion undetermined)",
   "description": "Heading levels should only increase by one. Detected by axe-core rule heading-order on 2300 of 3333 scanned pages (2442 instances).",
   "remediation_tip": "Use heading levels in order (h1 → h2 → h3) without skipping; structure, not size.",
   "suggested_fix": "See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/heading-order?application=axeAPI",
   "expected_behavior": "Element passes axe-core rule heading-order.",
   "actual_behavior": "Heading levels should only increase by one. Detected by axe-core rule heading-order on 2300 of 3333 scanned pages (2442 instances).",
   "testing_environment": "Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/challenges/nih-complement-animal-research-experimentation-nams-reduction-practice-challenge",
    "https://www.nih.gov/news-events/nih-research-matters/mrna-vaccine-treat-pancreatic-cancer",
    "https://www.nih.gov/about-nih/science-health-public-trust/checklist-communicating-science-health-research-public"
   ],
   "html_fragments": [
    {
     "fingerprint": "5c474edc",
     "html": "<h3 class=\"promo-block__heading\"><a id=\"\" class=\"usa-anchor\"></a></h3>",
     "selectors": [
      ".promo-block__heading"
     ]
    },
    {
     "fingerprint": "c7d750d9",
     "html": "<h4 class=\"usa-accordion__heading\">\n        <button class=\"usa-accordion__button\" aria-expanded=\"false\" aria-controls=\"uswds-paragraph-42376\">\n          Phase 1: Proof of Concept and Feasibility Studi",
     "selectors": [
      "div[aria-multiselectable=\"true\"] > .paragraph--type--uswds-accordion-item.paragraph.paragraph--view-mode--default:nth-child(1) > h4"
     ]
    },
    {
     "fingerprint": "c5acd35f",
     "html": "<h4 class=\"usa-accordion__heading\">\n        <button class=\"usa-accordion__button\" aria-expanded=\"false\" aria-controls=\"uswds-paragraph-42396\">\n          Phase 1: Proof of Concept and Feasibility Studi",
     "selectors": [
      ".field__item:nth-child(4) > .grid-col-fill > .usa-accordion--bordered.paragraph--type--uswds-accordion.usa-accordion > .paragraph--type--uswds-accordion-item.paragraph.paragraph--view-mode--default:nth-child(1) > h4"
     ]
    }
   ],
   "url_patterns": [
    {
     "pattern": "/challenges/nih-complement-animal-research-experimentation-nams-reduction-practice-challenge",
     "count": 1
    },
    {
     "pattern": "/news-events/nih-research-matters/mrna-vaccine-treat-pancreatic-cancer",
     "count": 1
    },
    {
     "pattern": "/about-nih/science-health-public-trust/checklist-communicating-science-health-research-public",
     "count": 1
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [],
    "summary": "Not captured by automated scan — requires manual testing."
   }
  },
  {
   "finding_id": "VS-a0bdbdf6",
   "fingerprint": "ca0fa40f",
   "rule_id": "list",
   "rule_label": "<ul> and <ol> must only directly contain <li>, <script> or <template> elements",
   "engine": "axe-core",
   "tool": "axe-core",
   "wcag_sc": "1.3.1",
   "wcag_name": "Info and Relationships",
   "wcag_level": "A",
   "wcag_version": "2.0",
   "wcag_category": "WCAG 2.0 A",
   "rule_url": "https://dequeuniversity.com/rules/axe/4.12/list?application=axeAPI",
   "severity": "Serious",
   "priority": "p1",
   "confidence": "high",
   "rationale": "Serious severity; affects 104 pages; persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W29",
    "last_observed": "2026-W29",
    "weeks_observed": 1,
    "affected_pages_current": 104,
    "affected_pages_previous": 2
   },
   "frequency": {
    "instances": 104,
    "pages_affected": 104,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "<ul> and <ol> must only directly contain <li>, <script> or <template> elements (WCAG 1.3.1)",
   "description": "<ul> and <ol> must only directly contain <li>, <script> or <template> elements. Detected by axe-core rule list on 104 of 3333 scanned pages (104 instances).",
   "remediation_tip": "Use <ul>/<ol> with only <li> children for lists; don't fake lists with <div>s.",
   "suggested_fix": "See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/list?application=axeAPI",
   "expected_behavior": "Element passes axe-core rule list (WCAG 1.3.1).",
   "actual_behavior": "<ul> and <ol> must only directly contain <li>, <script> or <template> elements. Detected by axe-core rule list on 104 of 3333 scanned pages (104 instances).",
   "testing_environment": "Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/heal/award-policy/data-sharing-policy/common-data-elements-cdes-repository?page=14",
    "https://www.nih.gov/news-events/nih-research-matters?page=0",
    "https://nih.gov/press-room?page=184"
   ],
   "html_fragments": [
    {
     "fingerprint": "0662122e",
     "html": "<ul class=\"usa-pagination__list pager__items js-pager__items\">",
     "selectors": [
      ".usa-pagination__list"
     ]
    },
    {
     "fingerprint": "becbf4e3",
     "html": "<ul>\n\t\t\t\t<li>Enclosure: Letter from Mr. R. Lanman to Mr. D. Ware (Response to assurance of Baxter to DHHS)</li>\n\t\t\t\t<br>\n\t\t\t\t<li>Letter from Mr. V. R. Loucks to Sec. D. Shalala (July 12)</li>\n\t\t\t</ul>",
     "selectors": [
      "tr:nth-child(37) > td:nth-child(2) > ul"
     ]
    }
   ],
   "url_patterns": [
    {
     "pattern": "/heal/award-policy/data-sharing-policy/common-data-elements-cdes-repository",
     "count": 6
    },
    {
     "pattern": "/news-events/nih-research-matters",
     "count": 6
    },
    {
     "pattern": "/news-events/news-releases",
     "count": 6
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [
     {
      "code": "WV",
      "group": "Without vision",
      "prevalence": 0.01,
      "percent": "1.0%",
      "estimatedExcluded": null
     },
     {
      "code": "LV",
      "group": "Limited vision",
      "prevalence": 0.024,
      "percent": "2.4%",
      "estimatedExcluded": null
     },
     {
      "code": "LCLA",
      "group": "Limited cognitive, language, or learning ability",
      "prevalence": 0.11,
      "percent": "11.0%",
      "estimatedExcluded": null
     }
    ],
    "summary": "Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%)."
   }
  },
  {
   "finding_id": "VS-9074b4dd",
   "fingerprint": "f1846b41",
   "rule_id": "image-alt",
   "rule_label": "Images must have alternative text",
   "engine": "axe-core",
   "tool": "axe-core",
   "wcag_sc": "1.1.1",
   "wcag_name": "Non-text Content",
   "wcag_level": "A",
   "wcag_version": "2.0",
   "wcag_category": "WCAG 2.0 A",
   "rule_url": "https://dequeuniversity.com/rules/axe/4.12/image-alt?application=axeAPI",
   "severity": "Critical",
   "priority": "p1",
   "confidence": "high",
   "rationale": "Critical severity; persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W29",
    "last_observed": "2026-W29",
    "weeks_observed": 1,
    "affected_pages_current": 50,
    "affected_pages_previous": null
   },
   "frequency": {
    "instances": 111,
    "pages_affected": 50,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Images must have alternative text (WCAG 1.1.1)",
   "description": "Images must have alternative text. Detected by axe-core rule image-alt on 50 of 3333 scanned pages (111 instances).",
   "remediation_tip": "Give every <img> a meaningful alt attribute. Use alt=\"\" only for decorative images so screen readers skip them.",
   "suggested_fix": "See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/image-alt?application=axeAPI",
   "expected_behavior": "Element passes axe-core rule image-alt (WCAG 1.1.1).",
   "actual_behavior": "Images must have alternative text. Detected by axe-core rule image-alt on 50 of 3333 scanned pages (111 instances).",
   "testing_environment": "Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://nih.gov/news-events/nih-research-matters/2024-nih-research-highlights-human-health-advances",
    "https://www.nih.gov/news-events/nih-research-matters?page=0",
    "https://www.nih.gov/news-events/nih-research-matters/2024-nih-research-highlights-human-health-advances"
   ],
   "html_fragments": [
    {
     "fingerprint": "5c700e1f",
     "html": "<img loading=\"lazy\" src=\"/sites/default/files/styles/thumbnail_large/public/2025-05/20240917-blood-test.jpg?itok=8VWvchu8\" width=\"200\" height=\"auto\" class=\"image-style-thumbnail-large\">",
     "selectors": [
      ".thumbnail-teaser.thumbnail-teaser--1col:nth-child(2) > .link--no-tag.thumbnail-teaser__link[typeof=\"schema:WebPage\"] > .thumbnail-teaser__img > .image-style-thumbnail-large[loading=\"lazy\"][width=\"200\"]"
     ]
    },
    {
     "fingerprint": "a8c3138b",
     "html": "<img loading=\"lazy\" src=\"/sites/default/files/styles/thumbnail_large/public/2025-05/20240910-speech-1.jpg?itok=Gvb_0tux\" width=\"200\" height=\"auto\" class=\"image-style-thumbnail-large\">",
     "selectors": [
      ".thumbnail-teaser.thumbnail-teaser--1col:nth-child(4) > .link--no-tag.thumbnail-teaser__link[typeof=\"schema:WebPage\"] > .thumbnail-teaser__img > .image-style-thumbnail-large[loading=\"lazy\"][width=\"200\"]"
     ]
    },
    {
     "fingerprint": "9da15ed0",
     "html": "<img loading=\"lazy\" src=\"/sites/default/files/styles/thumbnail_large/public/2026-06/20260616-covid.jpg?itok=wK88ho3h\" width=\"200\" height=\"auto\" class=\"image-style-thumbnail-large\">",
     "selectors": [
      ".thumbnail-teaser:nth-child(1) > .thumbnail-teaser__link.link--no-tag[typeof=\"schema:WebPage\"] > .thumbnail-teaser__img > .field--name-field-thumbnail.field--type-entity-reference.field__item > .image-style-thumbnail-large[loading=\"lazy\"][width=\"200\"]"
     ]
    }
   ],
   "url_patterns": [
    {
     "pattern": "/news-events/nih-research-matters",
     "count": 6
    },
    {
     "pattern": "/news-events/nih-research-matters/research-in-context",
     "count": 3
    },
    {
     "pattern": "/news-events/nih-research-matters/{id}-nih-research-highlights-human-health-advances",
     "count": 2
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [
     {
      "code": "WV",
      "group": "Without vision",
      "prevalence": 0.01,
      "percent": "1.0%",
      "estimatedExcluded": null
     },
     {
      "code": "LV",
      "group": "Limited vision",
      "prevalence": 0.024,
      "percent": "2.4%",
      "estimatedExcluded": null
     },
     {
      "code": "LCLA",
      "group": "Limited cognitive, language, or learning ability",
      "prevalence": 0.11,
      "percent": "11.0%",
      "estimatedExcluded": null
     }
    ],
    "summary": "Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%)."
   }
  },
  {
   "finding_id": "VS-1467ea8a",
   "fingerprint": "fc8886ab",
   "rule_id": "aria-allowed-attr",
   "rule_label": "Elements must only use supported ARIA attributes",
   "engine": "axe-core",
   "tool": "axe-core",
   "wcag_sc": "4.1.2",
   "wcag_name": "Name, Role, Value",
   "wcag_level": "A",
   "wcag_version": "2.0",
   "wcag_category": "WCAG 2.0 A",
   "rule_url": "https://dequeuniversity.com/rules/axe/4.12/aria-allowed-attr?application=axeAPI",
   "severity": "Critical",
   "priority": "p1",
   "confidence": "high",
   "rationale": "Critical severity; persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W29",
    "last_observed": "2026-W29",
    "weeks_observed": 1,
    "affected_pages_current": 28,
    "affected_pages_previous": null
   },
   "frequency": {
    "instances": 41,
    "pages_affected": 28,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Elements must only use supported ARIA attributes (WCAG 4.1.2)",
   "description": "Elements must only use supported ARIA attributes. Detected by axe-core rule aria-allowed-attr on 28 of 3333 scanned pages (41 instances).",
   "remediation_tip": "Remove ARIA attributes that aren't allowed on this role/element.",
   "suggested_fix": "See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/aria-allowed-attr?application=axeAPI",
   "expected_behavior": "Element passes axe-core rule aria-allowed-attr (WCAG 4.1.2).",
   "actual_behavior": "Elements must only use supported ARIA attributes. Detected by axe-core rule aria-allowed-attr on 28 of 3333 scanned pages (41 instances).",
   "testing_environment": "Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/challenges/nih-complement-animal-research-experimentation-nams-reduction-practice-challenge",
    "https://www.nih.gov/research-training/medical-research-initiatives/brain-initiative/about/vision/brain-2025-scientific-vision",
    "https://www.nih.gov/challenges/ncats-translational-science-education-training-challenge"
   ],
   "html_fragments": [
    {
     "fingerprint": "91ef8722",
     "html": "<div aria-multiselectable=\"true\" class=\"usa-accordion usa-accordion--bordered paragraph paragraph--type--uswds-accordion paragraph--view-mode--default\">",
     "selectors": [
      "div[aria-multiselectable=\"true\"]",
      ".usa-accordion--bordered"
     ]
    }
   ],
   "url_patterns": [
    {
     "pattern": "/nih-blueprint-neuroscience-research/blueprint-research-initiatives/blueprint-neurotherapeutics-network-bpn-small-molecules",
     "count": 2
    },
    {
     "pattern": "/heal/resources",
     "count": 2
    },
    {
     "pattern": "/brain-initiative/funding/funding-opportunities",
     "count": 2
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [
     {
      "code": "WV",
      "group": "Without vision",
      "prevalence": 0.01,
      "percent": "1.0%",
      "estimatedExcluded": null
     },
     {
      "code": "LV",
      "group": "Limited vision",
      "prevalence": 0.024,
      "percent": "2.4%",
      "estimatedExcluded": null
     },
     {
      "code": "LM",
      "group": "Limited manipulation/strength",
      "prevalence": 0.13,
      "percent": "13.0%",
      "estimatedExcluded": null
     }
    ],
    "summary": "Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%)."
   }
  },
  {
   "finding_id": "VS-e9fe47ac",
   "fingerprint": "f85a6839",
   "rule_id": "link-name",
   "rule_label": "Links must have discernible text",
   "engine": "axe-core",
   "tool": "axe-core",
   "wcag_sc": "2.4.4",
   "wcag_name": "Link Purpose (In Context)",
   "wcag_level": "A",
   "wcag_version": "2.0",
   "wcag_category": "WCAG 2.0 A",
   "rule_url": "https://dequeuniversity.com/rules/axe/4.12/link-name?application=axeAPI",
   "severity": "Serious",
   "priority": "p1",
   "confidence": "high",
   "rationale": "Serious severity; persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W29",
    "last_observed": "2026-W29",
    "weeks_observed": 1,
    "affected_pages_current": 26,
    "affected_pages_previous": null
   },
   "frequency": {
    "instances": 26,
    "pages_affected": 26,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Links must have discernible text (WCAG 2.4.4)",
   "description": "Links must have discernible text. Detected by axe-core rule link-name on 26 of 3333 scanned pages (26 instances).",
   "remediation_tip": "Give the link discernible text. Avoid empty links and icon-only links without an aria-label.",
   "suggested_fix": "See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/link-name?application=axeAPI",
   "expected_behavior": "Element passes axe-core rule link-name (WCAG 2.4.4).",
   "actual_behavior": "Links must have discernible text. Detected by axe-core rule link-name on 26 of 3333 scanned pages (26 instances).",
   "testing_environment": "Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/challenges/nih-complement-animal-research-experimentation-nams-reduction-practice-challenge",
    "https://www.nih.gov/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
    "https://www.nih.gov/challenges/ncats-translational-science-education-training-challenge"
   ],
   "html_fragments": [
    {
     "fingerprint": "2a7e156f",
     "html": "<a href=\"#\" class=\"usa-in-page-nav__link\"></a>",
     "selectors": [
      ".usa-in-page-nav__link[href=\"#\"]"
     ]
    }
   ],
   "url_patterns": [
    {
     "pattern": "/challenges/nih-complement-animal-research-experimentation-nams-reduction-practice-challenge",
     "count": 1
    },
    {
     "pattern": "/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
     "count": 1
    },
    {
     "pattern": "/challenges/ncats-translational-science-education-training-challenge",
     "count": 1
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [
     {
      "code": "WV",
      "group": "Without vision",
      "prevalence": 0.01,
      "percent": "1.0%",
      "estimatedExcluded": null
     },
     {
      "code": "LV",
      "group": "Limited vision",
      "prevalence": 0.024,
      "percent": "2.4%",
      "estimatedExcluded": null
     },
     {
      "code": "LCLA",
      "group": "Limited cognitive, language, or learning ability",
      "prevalence": 0.11,
      "percent": "11.0%",
      "estimatedExcluded": null
     }
    ],
    "summary": "Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%)."
   }
  },
  {
   "finding_id": "VS-fafffee0",
   "fingerprint": "d5e15238",
   "rule_id": "label",
   "rule_label": "Form elements must have labels",
   "engine": "axe-core",
   "tool": "axe-core",
   "wcag_sc": "4.1.2",
   "wcag_name": "Name, Role, Value",
   "wcag_level": "A",
   "wcag_version": "2.0",
   "wcag_category": "WCAG 2.0 A",
   "rule_url": "https://dequeuniversity.com/rules/axe/4.12/label?application=axeAPI",
   "severity": "Critical",
   "priority": "p1",
   "confidence": "high",
   "rationale": "Critical severity; persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W29",
    "last_observed": "2026-W29",
    "weeks_observed": 1,
    "affected_pages_current": 24,
    "affected_pages_previous": null
   },
   "frequency": {
    "instances": 28,
    "pages_affected": 24,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Form elements must have labels (WCAG 4.1.2)",
   "description": "Form elements must have labels. Detected by axe-core rule label on 24 of 3333 scanned pages (28 instances).",
   "remediation_tip": "Associate every form control with a <label> (via for/id) or an aria-label/aria-labelledby.",
   "suggested_fix": "See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/label?application=axeAPI",
   "expected_behavior": "Element passes axe-core rule label (WCAG 4.1.2).",
   "actual_behavior": "Form elements must have labels. Detected by axe-core rule label on 24 of 3333 scanned pages (28 instances).",
   "testing_environment": "Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://nih.gov/news-events/news-releases?page=181",
    "https://nih.gov/news-events/news-releases?page=179",
    "https://nih.gov/about-nih/visitor-information/request-tour-nih"
   ],
   "html_fragments": [
    {
     "fingerprint": "35bea3c3",
     "html": "<input class=\"chosen-search-input\" type=\"text\" autocomplete=\"off\" readonly=\"\" data-bef-auto-submit-exclude=\"true\">",
     "selectors": [
      ".chosen-search-input",
      "input[readonly=\"\"]"
     ]
    },
    {
     "fingerprint": "af0c4492",
     "html": "<input class=\"chosen-search-input\" type=\"text\" autocomplete=\"off\" data-bef-auto-submit-exclude=\"true\">",
     "selectors": [
      "#edit_state_chosen > .chosen-drop > .chosen-search > .chosen-search-input[data-bef-auto-submit-exclude=\"true\"][autocomplete=\"off\"]",
      "#edit_country_chosen > .chosen-drop > .chosen-search > .chosen-search-input[data-bef-auto-submit-exclude=\"true\"][autocomplete=\"off\"]"
     ]
    }
   ],
   "url_patterns": [
    {
     "pattern": "/news-events/news-releases",
     "count": 22
    },
    {
     "pattern": "/about-nih/visitor-information/request-tour-nih",
     "count": 2
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [
     {
      "code": "WV",
      "group": "Without vision",
      "prevalence": 0.01,
      "percent": "1.0%",
      "estimatedExcluded": null
     },
     {
      "code": "LV",
      "group": "Limited vision",
      "prevalence": 0.024,
      "percent": "2.4%",
      "estimatedExcluded": null
     },
     {
      "code": "LM",
      "group": "Limited manipulation/strength",
      "prevalence": 0.13,
      "percent": "13.0%",
      "estimatedExcluded": null
     }
    ],
    "summary": "Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%)."
   }
  },
  {
   "finding_id": "VS-dd1c019f",
   "fingerprint": "dec2d038",
   "rule_id": "valid-lang",
   "rule_label": "lang attribute must have a valid value",
   "engine": "axe-core",
   "tool": "axe-core",
   "wcag_sc": "3.1.2",
   "wcag_name": "Language of Parts",
   "wcag_level": "AA",
   "wcag_version": "2.0",
   "wcag_category": "WCAG 2.0 AA",
   "rule_url": "https://dequeuniversity.com/rules/axe/4.12/valid-lang?application=axeAPI",
   "severity": "Serious",
   "priority": "p1",
   "confidence": "high",
   "rationale": "Serious severity; persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W29",
    "last_observed": "2026-W29",
    "weeks_observed": 1,
    "affected_pages_current": 20,
    "affected_pages_previous": null
   },
   "frequency": {
    "instances": 40,
    "pages_affected": 20,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "lang attribute must have a valid value (WCAG 3.1.2)",
   "description": "lang attribute must have a valid value. Detected by axe-core rule valid-lang on 20 of 3333 scanned pages (40 instances).",
   "remediation_tip": null,
   "suggested_fix": "See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/valid-lang?application=axeAPI",
   "expected_behavior": "Element passes axe-core rule valid-lang (WCAG 3.1.2).",
   "actual_behavior": "lang attribute must have a valid value. Detected by axe-core rule valid-lang on 20 of 3333 scanned pages (40 instances).",
   "testing_environment": "Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/institutes-nih/nih-office-director/office-communications-public-liaison/public-affairs",
    "https://nih.gov/institutes-nih/nih-office-director/office-communications-public-liaison/community-liaison-council-meeting-minutes-thursday-january-10-2019",
    "https://nih.gov/institutes-nih/nih-office-director/office-communications-public-liaison/community-liaison-council-meeting-minutes-thursday-september-15-2022"
   ],
   "html_fragments": [
    {
     "fingerprint": "1d18dc57",
     "html": "<a href=\"https://salud.nih.gov/preguntele-a-carla\" lang=\"esp\">Pregúntele a Carla</a>",
     "selectors": [
      "li:nth-child(12) > a[lang=\"esp\"]"
     ]
    },
    {
     "fingerprint": "128d0455",
     "html": "<a href=\"https://salud.nih.gov/\" lang=\"esp\">Salud NIH</a>",
     "selectors": [
      "a[lang=\"esp\"][href$=\"salud.nih.gov/\"]"
     ]
    }
   ],
   "url_patterns": [
    {
     "pattern": "/institutes-nih/nih-office-director/office-communications-public-liaison/public-affairs",
     "count": 3
    },
    {
     "pattern": "/institutes-nih/nih-office-director/office-communications-public-liaison",
     "count": 3
    },
    {
     "pattern": "/institutes-nih/nih-office-director/office-communications-public-liaison/public-information",
     "count": 3
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [
     {
      "code": "WV",
      "group": "Without vision",
      "prevalence": 0.01,
      "percent": "1.0%",
      "estimatedExcluded": null
     },
     {
      "code": "LCLA",
      "group": "Limited cognitive, language, or learning ability",
      "prevalence": 0.11,
      "percent": "11.0%",
      "estimatedExcluded": null
     }
    ],
    "summary": "Affects Without vision (1.0%), Limited cognitive, language, or learning ability (11.0%)."
   }
  },
  {
   "finding_id": "VS-be8d563e",
   "fingerprint": "1820bc84",
   "rule_id": "color-contrast",
   "rule_label": "Elements must meet minimum color contrast ratio thresholds",
   "engine": "axe-core",
   "tool": "axe-core",
   "wcag_sc": "1.4.3",
   "wcag_name": "Contrast (Minimum)",
   "wcag_level": "AA",
   "wcag_version": "2.0",
   "wcag_category": "WCAG 2.0 AA",
   "rule_url": "https://dequeuniversity.com/rules/axe/4.12/color-contrast?application=axeAPI",
   "severity": "Serious",
   "priority": "p1",
   "confidence": "high",
   "rationale": "Serious severity; persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W29",
    "last_observed": "2026-W29",
    "weeks_observed": 1,
    "affected_pages_current": 12,
    "affected_pages_previous": null
   },
   "frequency": {
    "instances": 21,
    "pages_affected": 12,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Elements must meet minimum color contrast ratio thresholds (WCAG 1.4.3)",
   "description": "Elements must meet minimum color contrast ratio thresholds. Detected by axe-core rule color-contrast on 12 of 3333 scanned pages (21 instances).",
   "remediation_tip": "Increase the contrast between text and its background to at least 4.5:1 (3:1 for large text). Check both light and dark modes.",
   "suggested_fix": "See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/color-contrast?application=axeAPI",
   "expected_behavior": "Element passes axe-core rule color-contrast (WCAG 1.4.3).",
   "actual_behavior": "Elements must meet minimum color contrast ratio thresholds. Detected by axe-core rule color-contrast on 12 of 3333 scanned pages (21 instances).",
   "testing_environment": "Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/nih-blueprint-neuroscience-research/research-tools",
    "https://www.nih.gov/about-nih/history",
    "https://www.nih.gov/about-nih/history/tree-hippocrates"
   ],
   "html_fragments": [
    {
     "fingerprint": "b704095b",
     "html": "<div class=\"field field--name-field-credit field--type-string field--label-hidden field__item\">Sagar/Adobe Stock</div>",
     "selectors": [
      ".field--name-field-credit"
     ]
    },
    {
     "fingerprint": "824f53ea",
     "html": "<div class=\"clearfix text-formatted field field--name-field-long-caption field--type-text-long field--label-hidden field__item\">Dr. Joseph Goldberger seated at a table in a hospital.</div>",
     "selectors": [
      ".field--name-field-long-caption"
     ]
    },
    {
     "fingerprint": "d177bd07",
     "html": "<div class=\"clearfix text-formatted field field--name-field-long-caption field--type-text-long field--label-hidden field__item\">Video: NIH Dedicates Tree of Hippocrates</div>",
     "selectors": [
      ".media--type-remote-video > .field--name-field-long-caption.text-formatted.field--type-text-long"
     ]
    }
   ],
   "url_patterns": [
    {
     "pattern": "/about-nih/history",
     "count": 3
    },
    {
     "pattern": "/about-nih/organization/history",
     "count": 3
    },
    {
     "pattern": "/nih-blueprint-neuroscience-research/research-tools",
     "count": 2
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [
     {
      "code": "LV",
      "group": "Limited vision",
      "prevalence": 0.024,
      "percent": "2.4%",
      "estimatedExcluded": null
     },
     {
      "code": "WPC",
      "group": "Without color perception",
      "prevalence": 0.045,
      "percent": "4.5%",
      "estimatedExcluded": null
     }
    ],
    "summary": "Affects Limited vision (2.4%), Without color perception (4.5%)."
   }
  },
  {
   "finding_id": "VS-c613c153",
   "fingerprint": "364ee5cc",
   "rule_id": "scrollable-region-focusable",
   "rule_label": "Scrollable region must have keyboard access",
   "engine": "axe-core",
   "tool": "axe-core",
   "wcag_sc": "2.1.1",
   "wcag_name": "Keyboard",
   "wcag_level": "A",
   "wcag_version": "2.0",
   "wcag_category": "WCAG 2.0 A",
   "rule_url": "https://dequeuniversity.com/rules/axe/4.12/scrollable-region-focusable?application=axeAPI",
   "severity": "Serious",
   "priority": "p1",
   "confidence": "low",
   "rationale": "Serious severity; persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W29",
    "last_observed": "2026-W29",
    "weeks_observed": 1,
    "affected_pages_current": 1,
    "affected_pages_previous": null
   },
   "frequency": {
    "instances": 4,
    "pages_affected": 1,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Scrollable region must have keyboard access (WCAG 2.1.1)",
   "description": "Scrollable region must have keyboard access. Detected by axe-core rule scrollable-region-focusable on 1 of 3333 scanned pages (4 instances).",
   "remediation_tip": "Make scrollable regions keyboard-focusable (tabindex=\"0\") so keyboard users can scroll them.",
   "suggested_fix": "See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/scrollable-region-focusable?application=axeAPI",
   "expected_behavior": "Element passes axe-core rule scrollable-region-focusable (WCAG 2.1.1).",
   "actual_behavior": "Scrollable region must have keyboard access. Detected by axe-core rule scrollable-region-focusable on 1 of 3333 scanned pages (4 instances).",
   "testing_environment": "Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://nih.gov/heal/heal-initiative-requirements/data-sharing-policy/common-data-elements-cdes-program"
   ],
   "html_fragments": [
    {
     "fingerprint": "d579fe93",
     "html": "<div class=\"usa-table-container--scrollable\">",
     "selectors": [
      ".usa-table-container--scrollable:nth-child(29)",
      ".usa-table-container--scrollable:nth-child(31)",
      ".usa-table-container--scrollable:nth-child(36)"
     ]
    }
   ],
   "url_patterns": [
    {
     "pattern": "/heal/heal-initiative-requirements/data-sharing-policy/common-data-elements-cdes-program",
     "count": 1
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [
     {
      "code": "WV",
      "group": "Without vision",
      "prevalence": 0.01,
      "percent": "1.0%",
      "estimatedExcluded": null
     },
     {
      "code": "LM",
      "group": "Limited manipulation/strength",
      "prevalence": 0.13,
      "percent": "13.0%",
      "estimatedExcluded": null
     },
     {
      "code": "LR",
      "group": "Limited reach",
      "prevalence": 0.02,
      "percent": "2.0%",
      "estimatedExcluded": null
     }
    ],
    "summary": "Affects Without vision (1.0%), Limited manipulation/strength (13.0%), Limited reach (2.0%)."
   }
  },
  {
   "finding_id": "VS-cb53cc4d",
   "fingerprint": "1738fa81",
   "rule_id": "sia-r111",
   "rule_label": "Target size is at least 44×44 CSS pixels (Enhanced)",
   "engine": "alfa",
   "tool": "Siteimprove Alfa",
   "wcag_sc": "2.5.5",
   "wcag_name": "Target Size (Enhanced)",
   "wcag_level": "AAA",
   "wcag_version": "2.1",
   "wcag_category": "WCAG 2.x AAA",
   "rule_url": "https://alfa.siteimprove.com/rules/sia-r111",
   "severity": "Moderate",
   "priority": "p2",
   "confidence": "high",
   "rationale": "affects 1550 pages; persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W25",
    "last_observed": "2026-W29",
    "weeks_observed": 3,
    "affected_pages_current": 1550,
    "affected_pages_previous": 12
   },
   "frequency": {
    "instances": 42751,
    "pages_affected": 1550,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Target size is at least 44×44 CSS pixels (Enhanced) (WCAG 2.5.5)",
   "description": "Target size is at least 44×44 CSS pixels (Enhanced). Detected by Siteimprove Alfa rule sia-r111 on 1550 of 3333 scanned pages (42751 instances).",
   "remediation_tip": null,
   "suggested_fix": "See remediation guidance: https://alfa.siteimprove.com/rules/sia-r111",
   "expected_behavior": "Element passes Siteimprove Alfa rule sia-r111 (WCAG 2.5.5).",
   "actual_behavior": "Target size is at least 44×44 CSS pixels (Enhanced). Detected by Siteimprove Alfa rule sia-r111 on 1550 of 3333 scanned pages (42751 instances).",
   "testing_environment": "Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
    "https://nih.gov/institutes-nih/nih-office-director/office-communications-public-liaison/freedom-information-act-office/other-public-information-servers",
    "https://nih.gov/news-events/nih-research-matters/immune-cells-control-waste-clearance-brain"
   ],
   "html_fragments": [],
   "url_patterns": [
    {
     "pattern": "/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
     "count": 1
    },
    {
     "pattern": "/institutes-nih/nih-office-director/office-communications-public-liaison/freedom-information-act-office/other-public-information-servers",
     "count": 1
    },
    {
     "pattern": "/news-events/nih-research-matters/immune-cells-control-waste-clearance-brain",
     "count": 1
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [],
    "summary": "Not captured by automated scan — requires manual testing."
   }
  },
  {
   "finding_id": "VS-e05344b9",
   "fingerprint": "9d7a222a",
   "rule_id": "sia-r18",
   "rule_label": "aria attribute is permitted for element role",
   "engine": "alfa",
   "tool": "Siteimprove Alfa",
   "wcag_sc": null,
   "wcag_name": null,
   "wcag_level": null,
   "wcag_version": null,
   "wcag_category": "Undetermined",
   "rule_url": "https://alfa.siteimprove.com/rules/sia-r18",
   "severity": "Moderate",
   "priority": "p2",
   "confidence": "high",
   "rationale": "affects 1550 pages; persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W25",
    "last_observed": "2026-W29",
    "weeks_observed": 3,
    "affected_pages_current": 1550,
    "affected_pages_previous": 12
   },
   "frequency": {
    "instances": 3140,
    "pages_affected": 1550,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "aria attribute is permitted for element role (WCAG criterion undetermined)",
   "description": "aria attribute is permitted for element role. Detected by Siteimprove Alfa rule sia-r18 on 1550 of 3333 scanned pages (3140 instances).",
   "remediation_tip": "Only use ARIA states/properties that are allowed on this element/role.",
   "suggested_fix": "See remediation guidance: https://alfa.siteimprove.com/rules/sia-r18",
   "expected_behavior": "Element passes Siteimprove Alfa rule sia-r18.",
   "actual_behavior": "aria attribute is permitted for element role. Detected by Siteimprove Alfa rule sia-r18 on 1550 of 3333 scanned pages (3140 instances).",
   "testing_environment": "Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
    "https://nih.gov/institutes-nih/nih-office-director/office-communications-public-liaison/freedom-information-act-office/other-public-information-servers",
    "https://nih.gov/news-events/nih-research-matters/immune-cells-control-waste-clearance-brain"
   ],
   "html_fragments": [],
   "url_patterns": [
    {
     "pattern": "/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
     "count": 1
    },
    {
     "pattern": "/institutes-nih/nih-office-director/office-communications-public-liaison/freedom-information-act-office/other-public-information-servers",
     "count": 1
    },
    {
     "pattern": "/news-events/nih-research-matters/immune-cells-control-waste-clearance-brain",
     "count": 1
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [],
    "summary": "Not captured by automated scan — requires manual testing."
   }
  },
  {
   "finding_id": "VS-efd91fdd",
   "fingerprint": "12434796",
   "rule_id": "sia-r62",
   "rule_label": "Link in text block is visually distinguishable without color",
   "engine": "alfa",
   "tool": "Siteimprove Alfa",
   "wcag_sc": "1.4.1",
   "wcag_name": "Use of Color",
   "wcag_level": "A",
   "wcag_version": "2.0",
   "wcag_category": "WCAG 2.0 A",
   "rule_url": "https://alfa.siteimprove.com/rules/sia-r62",
   "severity": "Moderate",
   "priority": "p2",
   "confidence": "high",
   "rationale": "affects 1548 pages; worsening trend",
   "trend": {
    "status": "worsening",
    "first_observed": "2026-W25",
    "last_observed": "2026-W29",
    "weeks_observed": 3,
    "affected_pages_current": 1548,
    "affected_pages_previous": 11
   },
   "frequency": {
    "instances": 4493,
    "pages_affected": 1548,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Link in text block is visually distinguishable without color (WCAG 1.4.1)",
   "description": "Link in text block is visually distinguishable without color. Detected by Siteimprove Alfa rule sia-r62 on 1548 of 3333 scanned pages (4493 instances).",
   "remediation_tip": "Make links visually distinguishable from surrounding text (not by color alone).",
   "suggested_fix": "See remediation guidance: https://alfa.siteimprove.com/rules/sia-r62",
   "expected_behavior": "Element passes Siteimprove Alfa rule sia-r62 (WCAG 1.4.1).",
   "actual_behavior": "Link in text block is visually distinguishable without color. Detected by Siteimprove Alfa rule sia-r62 on 1548 of 3333 scanned pages (4493 instances).",
   "testing_environment": "Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
    "https://nih.gov/institutes-nih/nih-office-director/office-communications-public-liaison/freedom-information-act-office/other-public-information-servers",
    "https://nih.gov/news-events/nih-research-matters/immune-cells-control-waste-clearance-brain"
   ],
   "html_fragments": [],
   "url_patterns": [
    {
     "pattern": "/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
     "count": 1
    },
    {
     "pattern": "/institutes-nih/nih-office-director/office-communications-public-liaison/freedom-information-act-office/other-public-information-servers",
     "count": 1
    },
    {
     "pattern": "/news-events/nih-research-matters/immune-cells-control-waste-clearance-brain",
     "count": 1
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [
     {
      "code": "WPC",
      "group": "Without color perception",
      "prevalence": 0.045,
      "percent": "4.5%",
      "estimatedExcluded": null
     },
     {
      "code": "LV",
      "group": "Limited vision",
      "prevalence": 0.024,
      "percent": "2.4%",
      "estimatedExcluded": null
     }
    ],
    "summary": "Affects Without color perception (4.5%), Limited vision (2.4%)."
   }
  },
  {
   "finding_id": "VS-646b1e0b",
   "fingerprint": "afad441e",
   "rule_id": "sia-r66",
   "rule_label": "Text has enhanced contrast",
   "engine": "alfa",
   "tool": "Siteimprove Alfa",
   "wcag_sc": "1.4.6",
   "wcag_name": "Contrast (Enhanced)",
   "wcag_level": "AAA",
   "wcag_version": "2.0",
   "wcag_category": "WCAG 2.x AAA",
   "rule_url": "https://alfa.siteimprove.com/rules/sia-r66",
   "severity": "Moderate",
   "priority": "p2",
   "confidence": "high",
   "rationale": "affects 1548 pages; worsening trend",
   "trend": {
    "status": "worsening",
    "first_observed": "2026-W25",
    "last_observed": "2026-W29",
    "weeks_observed": 3,
    "affected_pages_current": 1548,
    "affected_pages_previous": 11
   },
   "frequency": {
    "instances": 80442,
    "pages_affected": 1548,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Text has enhanced contrast (WCAG 1.4.6)",
   "description": "Text has enhanced contrast. Detected by Siteimprove Alfa rule sia-r66 on 1548 of 3333 scanned pages (80442 instances).",
   "remediation_tip": "Increase text contrast to meet WCAG AAA (7:1).",
   "suggested_fix": "See remediation guidance: https://alfa.siteimprove.com/rules/sia-r66",
   "expected_behavior": "Element passes Siteimprove Alfa rule sia-r66 (WCAG 1.4.6).",
   "actual_behavior": "Text has enhanced contrast. Detected by Siteimprove Alfa rule sia-r66 on 1548 of 3333 scanned pages (80442 instances).",
   "testing_environment": "Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
    "https://nih.gov/institutes-nih/nih-office-director/office-communications-public-liaison/freedom-information-act-office/other-public-information-servers",
    "https://nih.gov/news-events/nih-research-matters/immune-cells-control-waste-clearance-brain"
   ],
   "html_fragments": [],
   "url_patterns": [
    {
     "pattern": "/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
     "count": 1
    },
    {
     "pattern": "/institutes-nih/nih-office-director/office-communications-public-liaison/freedom-information-act-office/other-public-information-servers",
     "count": 1
    },
    {
     "pattern": "/news-events/nih-research-matters/immune-cells-control-waste-clearance-brain",
     "count": 1
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [],
    "summary": "Not captured by automated scan — requires manual testing."
   }
  },
  {
   "finding_id": "VS-2208081b",
   "fingerprint": "40bbca09",
   "rule_id": "sia-r73",
   "rule_label": "Text has minimum contrast ratio of 4.5:1",
   "engine": "alfa",
   "tool": "Siteimprove Alfa",
   "wcag_sc": "1.4.8",
   "wcag_name": "Visual Presentation",
   "wcag_level": "AAA",
   "wcag_version": "2.0",
   "wcag_category": "WCAG 2.x AAA",
   "rule_url": "https://alfa.siteimprove.com/rules/sia-r73",
   "severity": "Moderate",
   "priority": "p2",
   "confidence": "high",
   "rationale": "affects 1548 pages; persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W25",
    "last_observed": "2026-W29",
    "weeks_observed": 3,
    "affected_pages_current": 1548,
    "affected_pages_previous": 12
   },
   "frequency": {
    "instances": 5176,
    "pages_affected": 1548,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Text has minimum contrast ratio of 4.5:1 (WCAG 1.4.8)",
   "description": "Text has minimum contrast ratio of 4.5:1. Detected by Siteimprove Alfa rule sia-r73 on 1548 of 3333 scanned pages (5176 instances).",
   "remediation_tip": null,
   "suggested_fix": "See remediation guidance: https://alfa.siteimprove.com/rules/sia-r73",
   "expected_behavior": "Element passes Siteimprove Alfa rule sia-r73 (WCAG 1.4.8).",
   "actual_behavior": "Text has minimum contrast ratio of 4.5:1. Detected by Siteimprove Alfa rule sia-r73 on 1548 of 3333 scanned pages (5176 instances).",
   "testing_environment": "Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
    "https://nih.gov/institutes-nih/nih-office-director/office-communications-public-liaison/freedom-information-act-office/other-public-information-servers",
    "https://nih.gov/news-events/nih-research-matters/immune-cells-control-waste-clearance-brain"
   ],
   "html_fragments": [],
   "url_patterns": [
    {
     "pattern": "/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
     "count": 1
    },
    {
     "pattern": "/institutes-nih/nih-office-director/office-communications-public-liaison/freedom-information-act-office/other-public-information-servers",
     "count": 1
    },
    {
     "pattern": "/news-events/nih-research-matters/immune-cells-control-waste-clearance-brain",
     "count": 1
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [],
    "summary": "Not captured by automated scan — requires manual testing."
   }
  },
  {
   "finding_id": "VS-7118fead",
   "fingerprint": "0d932ac9",
   "rule_id": "sia-r61",
   "rule_label": "Form field label is visible",
   "engine": "alfa",
   "tool": "Siteimprove Alfa",
   "wcag_sc": null,
   "wcag_name": null,
   "wcag_level": null,
   "wcag_version": null,
   "wcag_category": "Undetermined",
   "rule_url": "https://alfa.siteimprove.com/rules/sia-r61",
   "severity": "Moderate",
   "priority": "p2",
   "confidence": "high",
   "rationale": "affects 1548 pages; persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W25",
    "last_observed": "2026-W29",
    "weeks_observed": 3,
    "affected_pages_current": 1548,
    "affected_pages_previous": 12
   },
   "frequency": {
    "instances": 1548,
    "pages_affected": 1548,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Form field label is visible (WCAG criterion undetermined)",
   "description": "Form field label is visible. Detected by Siteimprove Alfa rule sia-r61 on 1548 of 3333 scanned pages (1548 instances).",
   "remediation_tip": null,
   "suggested_fix": "See remediation guidance: https://alfa.siteimprove.com/rules/sia-r61",
   "expected_behavior": "Element passes Siteimprove Alfa rule sia-r61.",
   "actual_behavior": "Form field label is visible. Detected by Siteimprove Alfa rule sia-r61 on 1548 of 3333 scanned pages (1548 instances).",
   "testing_environment": "Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
    "https://nih.gov/institutes-nih/nih-office-director/office-communications-public-liaison/freedom-information-act-office/other-public-information-servers",
    "https://nih.gov/news-events/nih-research-matters/immune-cells-control-waste-clearance-brain"
   ],
   "html_fragments": [],
   "url_patterns": [
    {
     "pattern": "/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
     "count": 1
    },
    {
     "pattern": "/institutes-nih/nih-office-director/office-communications-public-liaison/freedom-information-act-office/other-public-information-servers",
     "count": 1
    },
    {
     "pattern": "/news-events/nih-research-matters/immune-cells-control-waste-clearance-brain",
     "count": 1
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [],
    "summary": "Not captured by automated scan — requires manual testing."
   }
  },
  {
   "finding_id": "VS-c18be945",
   "fingerprint": "8634e2fd",
   "rule_id": "sia-r57",
   "rule_label": "Scrolling content can be accessed by keyboard",
   "engine": "alfa",
   "tool": "Siteimprove Alfa",
   "wcag_sc": null,
   "wcag_name": null,
   "wcag_level": null,
   "wcag_version": null,
   "wcag_category": "Undetermined",
   "rule_url": "https://alfa.siteimprove.com/rules/sia-r57",
   "severity": "Moderate",
   "priority": "p2",
   "confidence": "high",
   "rationale": "affects 1541 pages; persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W25",
    "last_observed": "2026-W29",
    "weeks_observed": 3,
    "affected_pages_current": 1541,
    "affected_pages_previous": 12
   },
   "frequency": {
    "instances": 3621,
    "pages_affected": 1541,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Scrolling content can be accessed by keyboard (WCAG criterion undetermined)",
   "description": "Scrolling content can be accessed by keyboard. Detected by Siteimprove Alfa rule sia-r57 on 1541 of 3333 scanned pages (3621 instances).",
   "remediation_tip": null,
   "suggested_fix": "See remediation guidance: https://alfa.siteimprove.com/rules/sia-r57",
   "expected_behavior": "Element passes Siteimprove Alfa rule sia-r57.",
   "actual_behavior": "Scrolling content can be accessed by keyboard. Detected by Siteimprove Alfa rule sia-r57 on 1541 of 3333 scanned pages (3621 instances).",
   "testing_environment": "Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
    "https://nih.gov/institutes-nih/nih-office-director/office-communications-public-liaison/freedom-information-act-office/other-public-information-servers",
    "https://nih.gov/news-events/nih-research-matters/immune-cells-control-waste-clearance-brain"
   ],
   "html_fragments": [],
   "url_patterns": [
    {
     "pattern": "/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
     "count": 1
    },
    {
     "pattern": "/institutes-nih/nih-office-director/office-communications-public-liaison/freedom-information-act-office/other-public-information-servers",
     "count": 1
    },
    {
     "pattern": "/news-events/nih-research-matters/immune-cells-control-waste-clearance-brain",
     "count": 1
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [],
    "summary": "Not captured by automated scan — requires manual testing."
   }
  },
  {
   "finding_id": "VS-8806389c",
   "fingerprint": "ffb2ae06",
   "rule_id": "landmark-unique",
   "rule_label": "Landmarks should have a unique role or role/label/title (i.e. accessible name) c",
   "engine": "axe-core",
   "tool": "axe-core",
   "wcag_sc": null,
   "wcag_name": null,
   "wcag_level": null,
   "wcag_version": null,
   "wcag_category": "Best Practice",
   "rule_url": "https://dequeuniversity.com/rules/axe/4.12/landmark-unique?application=axeAPI",
   "severity": "Moderate",
   "priority": "p2",
   "confidence": "high",
   "rationale": "affects 1468 pages; persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W29",
    "last_observed": "2026-W29",
    "weeks_observed": 1,
    "affected_pages_current": 1468,
    "affected_pages_previous": 11
   },
   "frequency": {
    "instances": 1473,
    "pages_affected": 1468,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Landmarks should have a unique role or role/label/title (i.e. accessible name) c (WCAG criterion undetermined)",
   "description": "Landmarks should have a unique role or role/label/title (i.e. accessible name) c. Detected by axe-core rule landmark-unique on 1468 of 3333 scanned pages (1473 instances).",
   "remediation_tip": "When a landmark role/type repeats (e.g. two <nav>s), give each a distinct accessible name with aria-label or aria-labelledby (e.g. \"Primary\" and \"Footer\" navigation) so screen-reader users can tell them apart.",
   "suggested_fix": "See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/landmark-unique?application=axeAPI",
   "expected_behavior": "Element passes axe-core rule landmark-unique.",
   "actual_behavior": "Landmarks should have a unique role or role/label/title (i.e. accessible name) c. Detected by axe-core rule landmark-unique on 1468 of 3333 scanned pages (1473 instances).",
   "testing_environment": "Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/news-events/nih-research-matters/mrna-vaccine-treat-pancreatic-cancer",
    "https://nih.gov/news-events/nih-research-matters/immune-cells-control-waste-clearance-brain",
    "https://nih.gov/news-events/nih-research-matters/potent-antibodies-found-people-recovered-covid-19"
   ],
   "html_fragments": [
    {
     "fingerprint": "3b57434b",
     "html": "<div class=\"search-block-form usa-form block block-search container-inline\" data-drupal-selector=\"search-block-form\" id=\"block-nih2-uswds-search\" role=\"search\">",
     "selectors": [
      "#block-nih2-uswds-search"
     ]
    }
   ],
   "url_patterns": [
    {
     "pattern": "/news-events/nih-research-matters/mrna-vaccine-treat-pancreatic-cancer",
     "count": 1
    },
    {
     "pattern": "/news-events/nih-research-matters/immune-cells-control-waste-clearance-brain",
     "count": 1
    },
    {
     "pattern": "/news-events/nih-research-matters/potent-antibodies-found-people-recovered-covid-19",
     "count": 1
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [],
    "summary": "Not captured by automated scan — requires manual testing."
   }
  },
  {
   "finding_id": "VS-f054f4a4",
   "fingerprint": "5fa3b5a6",
   "rule_id": "sia-r53",
   "rule_label": "Headings are structured hierarchically",
   "engine": "alfa",
   "tool": "Siteimprove Alfa",
   "wcag_sc": null,
   "wcag_name": null,
   "wcag_level": null,
   "wcag_version": null,
   "wcag_category": "Undetermined",
   "rule_url": "https://alfa.siteimprove.com/rules/sia-r53",
   "severity": "Moderate",
   "priority": "p2",
   "confidence": "high",
   "rationale": "affects 1117 pages",
   "trend": {
    "status": "improving",
    "first_observed": "2026-W25",
    "last_observed": "2026-W29",
    "weeks_observed": 2,
    "affected_pages_current": 1117,
    "affected_pages_previous": 10
   },
   "frequency": {
    "instances": 1182,
    "pages_affected": 1117,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Headings are structured hierarchically (WCAG criterion undetermined)",
   "description": "Headings are structured hierarchically. Detected by Siteimprove Alfa rule sia-r53 on 1117 of 3333 scanned pages (1182 instances).",
   "remediation_tip": "Use headings in a logical, non-skipping order.",
   "suggested_fix": "See remediation guidance: https://alfa.siteimprove.com/rules/sia-r53",
   "expected_behavior": "Element passes Siteimprove Alfa rule sia-r53.",
   "actual_behavior": "Headings are structured hierarchically. Detected by Siteimprove Alfa rule sia-r53 on 1117 of 3333 scanned pages (1182 instances).",
   "testing_environment": "Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
    "https://nih.gov/news-events/nih-research-matters/immune-cells-control-waste-clearance-brain",
    "https://www.nih.gov/about-nih/voices-nih-community/they-cant-be-talking-about-me"
   ],
   "html_fragments": [],
   "url_patterns": [
    {
     "pattern": "/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
     "count": 1
    },
    {
     "pattern": "/news-events/nih-research-matters/immune-cells-control-waste-clearance-brain",
     "count": 1
    },
    {
     "pattern": "/about-nih/voices-nih-community/they-cant-be-talking-about-me",
     "count": 1
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [],
    "summary": "Not captured by automated scan — requires manual testing."
   }
  },
  {
   "finding_id": "VS-4c341c77",
   "fingerprint": "aada626a",
   "rule_id": "sia-r85",
   "rule_label": "Keyboard trap does not exist",
   "engine": "alfa",
   "tool": "Siteimprove Alfa",
   "wcag_sc": null,
   "wcag_name": null,
   "wcag_level": null,
   "wcag_version": null,
   "wcag_category": "Undetermined",
   "rule_url": "https://alfa.siteimprove.com/rules/sia-r85",
   "severity": "Moderate",
   "priority": "p2",
   "confidence": "high",
   "rationale": "affects 212 pages",
   "trend": {
    "status": "new",
    "first_observed": "2026-W29",
    "last_observed": "2026-W29",
    "weeks_observed": 1,
    "affected_pages_current": 212,
    "affected_pages_previous": 4
   },
   "frequency": {
    "instances": 258,
    "pages_affected": 212,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Keyboard trap does not exist (WCAG criterion undetermined)",
   "description": "Keyboard trap does not exist. Detected by Siteimprove Alfa rule sia-r85 on 212 of 3333 scanned pages (258 instances).",
   "remediation_tip": null,
   "suggested_fix": "See remediation guidance: https://alfa.siteimprove.com/rules/sia-r85",
   "expected_behavior": "Element passes Siteimprove Alfa rule sia-r85.",
   "actual_behavior": "Keyboard trap does not exist. Detected by Siteimprove Alfa rule sia-r85 on 212 of 3333 scanned pages (258 instances).",
   "testing_environment": "Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
    "http://mailto:RADxInfo@nih.gov/news-events/news-releases/nih-funded-clinical-trial-links-frequent-anger-increased-risk-heart-disease",
    "https://www.nih.gov/news-events/news-releases/brain-scan-guided-emergency-stroke-treatment-can-save-more-lives"
   ],
   "html_fragments": [],
   "url_patterns": [
    {
     "pattern": "/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
     "count": 1
    },
    {
     "pattern": "/news-events/news-releases/nih-funded-clinical-trial-links-frequent-anger-increased-risk-heart-disease",
     "count": 1
    },
    {
     "pattern": "/news-events/news-releases/brain-scan-guided-emergency-stroke-treatment-can-save-more-lives",
     "count": 1
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [],
    "summary": "Not captured by automated scan — requires manual testing."
   }
  },
  {
   "finding_id": "VS-3c632d31",
   "fingerprint": "7d010b8c",
   "rule_id": "sia-r64",
   "rule_label": "Element has required owned roles",
   "engine": "alfa",
   "tool": "Siteimprove Alfa",
   "wcag_sc": "1.3.1",
   "wcag_name": "Info and Relationships",
   "wcag_level": "A",
   "wcag_version": "2.0",
   "wcag_category": "WCAG 2.0 A",
   "rule_url": "https://alfa.siteimprove.com/rules/sia-r64",
   "severity": "Moderate",
   "priority": "p2",
   "confidence": "high",
   "rationale": "affects 134 pages",
   "trend": {
    "status": "improving",
    "first_observed": "2026-W25",
    "last_observed": "2026-W29",
    "weeks_observed": 2,
    "affected_pages_current": 134,
    "affected_pages_previous": 4
   },
   "frequency": {
    "instances": 134,
    "pages_affected": 134,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Element has required owned roles (WCAG 1.3.1)",
   "description": "Element has required owned roles. Detected by Siteimprove Alfa rule sia-r64 on 134 of 3333 scanned pages (134 instances).",
   "remediation_tip": null,
   "suggested_fix": "See remediation guidance: https://alfa.siteimprove.com/rules/sia-r64",
   "expected_behavior": "Element passes Siteimprove Alfa rule sia-r64 (WCAG 1.3.1).",
   "actual_behavior": "Element has required owned roles. Detected by Siteimprove Alfa rule sia-r64 on 134 of 3333 scanned pages (134 instances).",
   "testing_environment": "Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
    "https://nih.gov/news-events/nih-research-matters/2021-research-highlights-human-health-advances-0",
    "https://www.nih.gov/news-events/news-releases/brain-scan-guided-emergency-stroke-treatment-can-save-more-lives"
   ],
   "html_fragments": [],
   "url_patterns": [
    {
     "pattern": "/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
     "count": 1
    },
    {
     "pattern": "/news-events/nih-research-matters/{id}-research-highlights-human-health-advances-0",
     "count": 1
    },
    {
     "pattern": "/news-events/news-releases/brain-scan-guided-emergency-stroke-treatment-can-save-more-lives",
     "count": 1
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [
     {
      "code": "WV",
      "group": "Without vision",
      "prevalence": 0.01,
      "percent": "1.0%",
      "estimatedExcluded": null
     },
     {
      "code": "LV",
      "group": "Limited vision",
      "prevalence": 0.024,
      "percent": "2.4%",
      "estimatedExcluded": null
     },
     {
      "code": "LCLA",
      "group": "Limited cognitive, language, or learning ability",
      "prevalence": 0.11,
      "percent": "11.0%",
      "estimatedExcluded": null
     }
    ],
    "summary": "Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%)."
   }
  },
  {
   "finding_id": "VS-2cd767ca",
   "fingerprint": "3123e4f3",
   "rule_id": "sia-r78",
   "rule_label": "Table header has scope",
   "engine": "alfa",
   "tool": "Siteimprove Alfa",
   "wcag_sc": null,
   "wcag_name": null,
   "wcag_level": null,
   "wcag_version": null,
   "wcag_category": "Undetermined",
   "rule_url": "https://alfa.siteimprove.com/rules/sia-r78",
   "severity": "Moderate",
   "priority": "p2",
   "confidence": "high",
   "rationale": "persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W29",
    "last_observed": "2026-W29",
    "weeks_observed": 1,
    "affected_pages_current": 80,
    "affected_pages_previous": 3
   },
   "frequency": {
    "instances": 110,
    "pages_affected": 80,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Table header has scope (WCAG criterion undetermined)",
   "description": "Table header has scope. Detected by Siteimprove Alfa rule sia-r78 on 80 of 3333 scanned pages (110 instances).",
   "remediation_tip": null,
   "suggested_fix": "See remediation guidance: https://alfa.siteimprove.com/rules/sia-r78",
   "expected_behavior": "Element passes Siteimprove Alfa rule sia-r78.",
   "actual_behavior": "Table header has scope. Detected by Siteimprove Alfa rule sia-r78 on 80 of 3333 scanned pages (110 instances).",
   "testing_environment": "Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://nih.gov/news-events/news-releases/nih-clinical-trial-tuberculous-meningitis-drug-regimen-begins",
    "https://nih.gov/news-events/news-releases/nih-mobilizes-national-innovation-initiative-covid-19-diagnostics",
    "https://www.nih.gov/news-events/news-releases/roadmap-guide-progress-toward-replacing-animal-use-toxicity-testing"
   ],
   "html_fragments": [],
   "url_patterns": [
    {
     "pattern": "/institutes-nih/nih-office-director/office-communications-public-liaison/clear-communication/plain-language-nih/plain-language-getting-started-or-brushing-up/formatting-visual-clarity",
     "count": 2
    },
    {
     "pattern": "/news-events/news-releases/nih-clinical-trial-tuberculous-meningitis-drug-regimen-begins",
     "count": 1
    },
    {
     "pattern": "/news-events/news-releases/nih-mobilizes-national-innovation-initiative-covid-19-diagnostics",
     "count": 1
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [],
    "summary": "Not captured by automated scan — requires manual testing."
   }
  },
  {
   "finding_id": "VS-0066c67d",
   "fingerprint": "67db3700",
   "rule_id": "empty-heading",
   "rule_label": "Headings should not be empty",
   "engine": "axe-core",
   "tool": "axe-core",
   "wcag_sc": null,
   "wcag_name": null,
   "wcag_level": null,
   "wcag_version": null,
   "wcag_category": "Best Practice",
   "rule_url": "https://dequeuniversity.com/rules/axe/4.12/empty-heading?application=axeAPI",
   "severity": "Minor",
   "priority": "p3",
   "confidence": "high",
   "rationale": "affects 271 pages",
   "trend": {
    "status": "improving",
    "first_observed": "2026-W25",
    "last_observed": "2026-W29",
    "weeks_observed": 2,
    "affected_pages_current": 271,
    "affected_pages_previous": 6
   },
   "frequency": {
    "instances": 271,
    "pages_affected": 271,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Headings should not be empty (WCAG criterion undetermined)",
   "description": "Headings should not be empty. Detected by axe-core rule empty-heading on 271 of 3333 scanned pages (271 instances).",
   "remediation_tip": "Remove empty headings or give them text. Don't use heading tags for spacing.",
   "suggested_fix": "See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/empty-heading?application=axeAPI",
   "expected_behavior": "Element passes axe-core rule empty-heading.",
   "actual_behavior": "Headings should not be empty. Detected by axe-core rule empty-heading on 271 of 3333 scanned pages (271 instances).",
   "testing_environment": "Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/challenges/nih-complement-animal-research-experimentation-nams-reduction-practice-challenge",
    "https://www.nih.gov/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
    "https://nih.gov/news-events/nih-research-matters/2021-research-highlights-human-health-advances-0"
   ],
   "html_fragments": [
    {
     "fingerprint": "5c474edc",
     "html": "<h3 class=\"promo-block__heading\"><a id=\"\" class=\"usa-anchor\"></a></h3>",
     "selectors": [
      ".promo-block__heading"
     ]
    },
    {
     "fingerprint": "e83663b2",
     "html": "<h2 class=\"element-invisible\">&nbsp;</h2>",
     "selectors": [
      ".element-invisible"
     ]
    },
    {
     "fingerprint": "49d5321b",
     "html": "<h3></h3>",
     "selectors": [
      "article[data-history-node-id=\"9436\"] > div > h3",
      "h3"
     ]
    }
   ],
   "url_patterns": [
    {
     "pattern": "/news-events/news-releases/nih-launches-new-office-advance-human-based-research-reduce-animal-use",
     "count": 2
    },
    {
     "pattern": "/challenges/nih-complement-animal-research-experimentation-nams-reduction-practice-challenge",
     "count": 1
    },
    {
     "pattern": "/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
     "count": 1
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [],
    "summary": "Not captured by automated scan — requires manual testing."
   }
  },
  {
   "finding_id": "VS-fa44f293",
   "fingerprint": "a01b2a6c",
   "rule_id": "page-has-heading-one",
   "rule_label": "Page should contain a level-one heading",
   "engine": "axe-core",
   "tool": "axe-core",
   "wcag_sc": null,
   "wcag_name": null,
   "wcag_level": null,
   "wcag_version": null,
   "wcag_category": "Best Practice",
   "rule_url": "https://dequeuniversity.com/rules/axe/4.12/page-has-heading-one?application=axeAPI",
   "severity": "Moderate",
   "priority": "p3",
   "confidence": "high",
   "rationale": "persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W25",
    "last_observed": "2026-W29",
    "weeks_observed": 2,
    "affected_pages_current": 40,
    "affected_pages_previous": null
   },
   "frequency": {
    "instances": 40,
    "pages_affected": 40,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Page should contain a level-one heading (WCAG criterion undetermined)",
   "description": "Page should contain a level-one heading. Detected by axe-core rule page-has-heading-one on 40 of 3333 scanned pages (40 instances).",
   "remediation_tip": null,
   "suggested_fix": "See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/page-has-heading-one?application=axeAPI",
   "expected_behavior": "Element passes axe-core rule page-has-heading-one.",
   "actual_behavior": "Page should contain a level-one heading. Detected by axe-core rule page-has-heading-one on 40 of 3333 scanned pages (40 instances).",
   "testing_environment": "Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/node",
    "https://nih.gov/institutes-nih/nih-office-director/office-communications-public-liaison/community-liaison-council-meeting-minutes-thursday-january-10-2019",
    "https://nih.gov/about-nih"
   ],
   "html_fragments": [
    {
     "fingerprint": "52e5a688",
     "html": "<html lang=\"en\" dir=\"ltr\" prefix=\"og: https://ogp.me/ns#\" class=\" js\">",
     "selectors": [
      "html"
     ]
    }
   ],
   "url_patterns": [
    {
     "pattern": "/news-events",
     "count": 3
    },
    {
     "pattern": "/node",
     "count": 2
    },
    {
     "pattern": "/about-nih",
     "count": 2
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [],
    "summary": "Not captured by automated scan — requires manual testing."
   }
  },
  {
   "finding_id": "VS-a24eaa8c",
   "fingerprint": "8d462fe1",
   "rule_id": "sia-r2",
   "rule_label": "Image has accessible name",
   "engine": "alfa",
   "tool": "Siteimprove Alfa",
   "wcag_sc": "1.1.1",
   "wcag_name": "Non-text Content",
   "wcag_level": "A",
   "wcag_version": "2.0",
   "wcag_category": "WCAG 2.0 A",
   "rule_url": "https://alfa.siteimprove.com/rules/sia-r2",
   "severity": "Moderate",
   "priority": "p3",
   "confidence": "high",
   "rationale": "persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W29",
    "last_observed": "2026-W29",
    "weeks_observed": 1,
    "affected_pages_current": 21,
    "affected_pages_previous": null
   },
   "frequency": {
    "instances": 49,
    "pages_affected": 21,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Image has accessible name (WCAG 1.1.1)",
   "description": "Image has accessible name. Detected by Siteimprove Alfa rule sia-r2 on 21 of 3333 scanned pages (49 instances).",
   "remediation_tip": "Give every <img> an accessible name (alt text), or alt=\"\" if purely decorative.",
   "suggested_fix": "See remediation guidance: https://alfa.siteimprove.com/rules/sia-r2",
   "expected_behavior": "Element passes Siteimprove Alfa rule sia-r2 (WCAG 1.1.1).",
   "actual_behavior": "Image has accessible name. Detected by Siteimprove Alfa rule sia-r2 on 21 of 3333 scanned pages (49 instances).",
   "testing_environment": "Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/news-events/nih-research-matters?page=0",
    "https://www.nih.gov/news-events/nih-research-matters/research-in-context",
    "https://nih.gov/research-training"
   ],
   "html_fragments": [],
   "url_patterns": [
    {
     "pattern": "/news-events/nih-research-matters",
     "count": 6
    },
    {
     "pattern": "/research-training/science-highlights",
     "count": 3
    },
    {
     "pattern": "/news-events/nih-research-matters/research-in-context",
     "count": 2
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [
     {
      "code": "WV",
      "group": "Without vision",
      "prevalence": 0.01,
      "percent": "1.0%",
      "estimatedExcluded": null
     },
     {
      "code": "LV",
      "group": "Limited vision",
      "prevalence": 0.024,
      "percent": "2.4%",
      "estimatedExcluded": null
     },
     {
      "code": "LCLA",
      "group": "Limited cognitive, language, or learning ability",
      "prevalence": 0.11,
      "percent": "11.0%",
      "estimatedExcluded": null
     }
    ],
    "summary": "Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%)."
   }
  },
  {
   "finding_id": "VS-28ebd979",
   "fingerprint": "032345cc",
   "rule_id": "sia-r11",
   "rule_label": "Link has accessible name",
   "engine": "alfa",
   "tool": "Siteimprove Alfa",
   "wcag_sc": "2.4.4",
   "wcag_name": "Link Purpose (In Context)",
   "wcag_level": "A",
   "wcag_version": "2.0",
   "wcag_category": "WCAG 2.0 A",
   "rule_url": "https://alfa.siteimprove.com/rules/sia-r11",
   "severity": "Moderate",
   "priority": "p3",
   "confidence": "high",
   "rationale": "persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W29",
    "last_observed": "2026-W29",
    "weeks_observed": 1,
    "affected_pages_current": 13,
    "affected_pages_previous": null
   },
   "frequency": {
    "instances": 13,
    "pages_affected": 13,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Link has accessible name (WCAG 2.4.4)",
   "description": "Link has accessible name. Detected by Siteimprove Alfa rule sia-r11 on 13 of 3333 scanned pages (13 instances).",
   "remediation_tip": "Give the link an accessible name via text content or aria-label.",
   "suggested_fix": "See remediation guidance: https://alfa.siteimprove.com/rules/sia-r11",
   "expected_behavior": "Element passes Siteimprove Alfa rule sia-r11 (WCAG 2.4.4).",
   "actual_behavior": "Link has accessible name. Detected by Siteimprove Alfa rule sia-r11 on 13 of 3333 scanned pages (13 instances).",
   "testing_environment": "Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
    "https://www.nih.gov/challenges/ncats-translational-science-education-training-challenge",
    "https://www.nih.gov/challenges/community-champions-disability-health-challenge"
   ],
   "html_fragments": [],
   "url_patterns": [
    {
     "pattern": "/challenges/supplements-facts-first-digital-adventure-every-age-challenge",
     "count": 1
    },
    {
     "pattern": "/challenges/ncats-translational-science-education-training-challenge",
     "count": 1
    },
    {
     "pattern": "/challenges/community-champions-disability-health-challenge",
     "count": 1
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [
     {
      "code": "WV",
      "group": "Without vision",
      "prevalence": 0.01,
      "percent": "1.0%",
      "estimatedExcluded": null
     },
     {
      "code": "LV",
      "group": "Limited vision",
      "prevalence": 0.024,
      "percent": "2.4%",
      "estimatedExcluded": null
     },
     {
      "code": "LCLA",
      "group": "Limited cognitive, language, or learning ability",
      "prevalence": 0.11,
      "percent": "11.0%",
      "estimatedExcluded": null
     }
    ],
    "summary": "Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%)."
   }
  },
  {
   "finding_id": "VS-d6097011",
   "fingerprint": "b46c5395",
   "rule_id": "sia-r68",
   "rule_label": "Presentational children of an element are not focusable",
   "engine": "alfa",
   "tool": "Siteimprove Alfa",
   "wcag_sc": "1.3.1",
   "wcag_name": "Info and Relationships",
   "wcag_level": "A",
   "wcag_version": "2.0",
   "wcag_category": "WCAG 2.0 A",
   "rule_url": "https://alfa.siteimprove.com/rules/sia-r68",
   "severity": "Moderate",
   "priority": "p3",
   "confidence": "high",
   "rationale": "persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W29",
    "last_observed": "2026-W29",
    "weeks_observed": 1,
    "affected_pages_current": 12,
    "affected_pages_previous": null
   },
   "frequency": {
    "instances": 15,
    "pages_affected": 12,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Presentational children of an element are not focusable (WCAG 1.3.1)",
   "description": "Presentational children of an element are not focusable. Detected by Siteimprove Alfa rule sia-r68 on 12 of 3333 scanned pages (15 instances).",
   "remediation_tip": null,
   "suggested_fix": "See remediation guidance: https://alfa.siteimprove.com/rules/sia-r68",
   "expected_behavior": "Element passes Siteimprove Alfa rule sia-r68 (WCAG 1.3.1).",
   "actual_behavior": "Presentational children of an element are not focusable. Detected by Siteimprove Alfa rule sia-r68 on 12 of 3333 scanned pages (15 instances).",
   "testing_environment": "Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://nih.gov/about-nih/visitor-information/request-tour-nih",
    "https://nih.gov/news-events/news-releases?page=2",
    "https://nih.gov/heal/heal-funding-opportunities"
   ],
   "html_fragments": [],
   "url_patterns": [
    {
     "pattern": "/news-events/news-releases",
     "count": 5
    },
    {
     "pattern": "/heal/heal-funding-opportunities",
     "count": 2
    },
    {
     "pattern": "/virtual-tour",
     "count": 2
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [
     {
      "code": "WV",
      "group": "Without vision",
      "prevalence": 0.01,
      "percent": "1.0%",
      "estimatedExcluded": null
     },
     {
      "code": "LV",
      "group": "Limited vision",
      "prevalence": 0.024,
      "percent": "2.4%",
      "estimatedExcluded": null
     },
     {
      "code": "LCLA",
      "group": "Limited cognitive, language, or learning ability",
      "prevalence": 0.11,
      "percent": "11.0%",
      "estimatedExcluded": null
     }
    ],
    "summary": "Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%)."
   }
  },
  {
   "finding_id": "VS-400f3a18",
   "fingerprint": "191f610a",
   "rule_id": "sia-r7",
   "rule_label": "Element with lang attribute has correct language",
   "engine": "alfa",
   "tool": "Siteimprove Alfa",
   "wcag_sc": "3.1.2",
   "wcag_name": "Language of Parts",
   "wcag_level": "AA",
   "wcag_version": "2.0",
   "wcag_category": "WCAG 2.0 AA",
   "rule_url": "https://alfa.siteimprove.com/rules/sia-r7",
   "severity": "Moderate",
   "priority": "p3",
   "confidence": "high",
   "rationale": "persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W29",
    "last_observed": "2026-W29",
    "weeks_observed": 1,
    "affected_pages_current": 11,
    "affected_pages_previous": null
   },
   "frequency": {
    "instances": 22,
    "pages_affected": 11,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Element with lang attribute has correct language (WCAG 3.1.2)",
   "description": "Element with lang attribute has correct language. Detected by Siteimprove Alfa rule sia-r7 on 11 of 3333 scanned pages (22 instances).",
   "remediation_tip": null,
   "suggested_fix": "See remediation guidance: https://alfa.siteimprove.com/rules/sia-r7",
   "expected_behavior": "Element passes Siteimprove Alfa rule sia-r7 (WCAG 3.1.2).",
   "actual_behavior": "Element with lang attribute has correct language. Detected by Siteimprove Alfa rule sia-r7 on 11 of 3333 scanned pages (22 instances).",
   "testing_environment": "Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://nih.gov/institutes-nih/nih-office-director/office-communications-public-liaison/community-liaison-council-meeting-minutes-thursday-january-10-2019",
    "https://www.nih.gov/institutes-nih/nih-office-director/office-communications-public-liaison",
    "https://www.nih.gov/institutes-nih/nih-office-director/office-communications-public-liaison/public-information"
   ],
   "html_fragments": [],
   "url_patterns": [
    {
     "pattern": "/institutes-nih/nih-office-director/office-communications-public-liaison/public-information",
     "count": 3
    },
    {
     "pattern": "/institutes-nih/nih-office-director/office-communications-public-liaison/community-liaison-council-meeting-minutes-thursday-january-10-2019",
     "count": 1
    },
    {
     "pattern": "/institutes-nih/nih-office-director/office-communications-public-liaison",
     "count": 1
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [
     {
      "code": "WV",
      "group": "Without vision",
      "prevalence": 0.01,
      "percent": "1.0%",
      "estimatedExcluded": null
     },
     {
      "code": "LCLA",
      "group": "Limited cognitive, language, or learning ability",
      "prevalence": 0.11,
      "percent": "11.0%",
      "estimatedExcluded": null
     }
    ],
    "summary": "Affects Without vision (1.0%), Limited cognitive, language, or learning ability (11.0%)."
   }
  },
  {
   "finding_id": "VS-a48e6078",
   "fingerprint": "2ccef0fa",
   "rule_id": "sia-r8",
   "rule_label": "Form field has accessible name",
   "engine": "alfa",
   "tool": "Siteimprove Alfa",
   "wcag_sc": "4.1.2",
   "wcag_name": "Name, Role, Value",
   "wcag_level": "A",
   "wcag_version": "2.0",
   "wcag_category": "WCAG 2.0 A",
   "rule_url": "https://alfa.siteimprove.com/rules/sia-r8",
   "severity": "Moderate",
   "priority": "p3",
   "confidence": "medium",
   "rationale": "persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W29",
    "last_observed": "2026-W29",
    "weeks_observed": 1,
    "affected_pages_current": 6,
    "affected_pages_previous": null
   },
   "frequency": {
    "instances": 8,
    "pages_affected": 6,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Form field has accessible name (WCAG 4.1.2)",
   "description": "Form field has accessible name. Detected by Siteimprove Alfa rule sia-r8 on 6 of 3333 scanned pages (8 instances).",
   "remediation_tip": "Associate the form field with a label.",
   "suggested_fix": "See remediation guidance: https://alfa.siteimprove.com/rules/sia-r8",
   "expected_behavior": "Element passes Siteimprove Alfa rule sia-r8 (WCAG 4.1.2).",
   "actual_behavior": "Form field has accessible name. Detected by Siteimprove Alfa rule sia-r8 on 6 of 3333 scanned pages (8 instances).",
   "testing_environment": "Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://nih.gov/about-nih/visitor-information/request-tour-nih",
    "https://nih.gov/news-events/news-releases?page=2",
    "https://nih.gov/news-events/news-releases"
   ],
   "html_fragments": [],
   "url_patterns": [
    {
     "pattern": "/news-events/news-releases",
     "count": 5
    },
    {
     "pattern": "/about-nih/visitor-information/request-tour-nih",
     "count": 1
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [
     {
      "code": "WV",
      "group": "Without vision",
      "prevalence": 0.01,
      "percent": "1.0%",
      "estimatedExcluded": null
     },
     {
      "code": "LV",
      "group": "Limited vision",
      "prevalence": 0.024,
      "percent": "2.4%",
      "estimatedExcluded": null
     },
     {
      "code": "LM",
      "group": "Limited manipulation/strength",
      "prevalence": 0.13,
      "percent": "13.0%",
      "estimatedExcluded": null
     }
    ],
    "summary": "Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%)."
   }
  },
  {
   "finding_id": "VS-f7e99f4b",
   "fingerprint": "863d1000",
   "rule_id": "sia-r69",
   "rule_label": "Text has sufficient color contrast (Enhanced)",
   "engine": "alfa",
   "tool": "Siteimprove Alfa",
   "wcag_sc": "1.4.3",
   "wcag_name": "Contrast (Minimum)",
   "wcag_level": "AA",
   "wcag_version": "2.0",
   "wcag_category": "WCAG 2.0 AA",
   "rule_url": "https://alfa.siteimprove.com/rules/sia-r69",
   "severity": "Moderate",
   "priority": "p3",
   "confidence": "medium",
   "rationale": "persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W29",
    "last_observed": "2026-W29",
    "weeks_observed": 1,
    "affected_pages_current": 5,
    "affected_pages_previous": null
   },
   "frequency": {
    "instances": 10,
    "pages_affected": 5,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Text has sufficient color contrast (Enhanced) (WCAG 1.4.3)",
   "description": "Text has sufficient color contrast (Enhanced). Detected by Siteimprove Alfa rule sia-r69 on 5 of 3333 scanned pages (10 instances).",
   "remediation_tip": "Increase text contrast to meet WCAG AA (4.5:1, or 3:1 for large text).",
   "suggested_fix": "See remediation guidance: https://alfa.siteimprove.com/rules/sia-r69",
   "expected_behavior": "Element passes Siteimprove Alfa rule sia-r69 (WCAG 1.4.3).",
   "actual_behavior": "Text has sufficient color contrast (Enhanced). Detected by Siteimprove Alfa rule sia-r69 on 5 of 3333 scanned pages (10 instances).",
   "testing_environment": "Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/about-nih/history",
    "https://nih.gov/nih-blueprint-neuroscience-research/training",
    "https://nih.gov/about-nih/history"
   ],
   "html_fragments": [],
   "url_patterns": [
    {
     "pattern": "/about-nih/history",
     "count": 2
    },
    {
     "pattern": "/nih-blueprint-neuroscience-research/training",
     "count": 1
    },
    {
     "pattern": "/about-nih/organization/history",
     "count": 1
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [
     {
      "code": "LV",
      "group": "Limited vision",
      "prevalence": 0.024,
      "percent": "2.4%",
      "estimatedExcluded": null
     },
     {
      "code": "WPC",
      "group": "Without color perception",
      "prevalence": 0.045,
      "percent": "4.5%",
      "estimatedExcluded": null
     }
    ],
    "summary": "Affects Limited vision (2.4%), Without color perception (4.5%)."
   }
  },
  {
   "finding_id": "VS-7fbb8b20",
   "fingerprint": "79bb1ee9",
   "rule_id": "sia-r59",
   "rule_label": "Element with orientation is not locked",
   "engine": "alfa",
   "tool": "Siteimprove Alfa",
   "wcag_sc": null,
   "wcag_name": null,
   "wcag_level": null,
   "wcag_version": null,
   "wcag_category": "Undetermined",
   "rule_url": "https://alfa.siteimprove.com/rules/sia-r59",
   "severity": "Moderate",
   "priority": "p3",
   "confidence": "low",
   "rationale": "persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W29",
    "last_observed": "2026-W29",
    "weeks_observed": 1,
    "affected_pages_current": 2,
    "affected_pages_previous": null
   },
   "frequency": {
    "instances": 2,
    "pages_affected": 2,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Element with orientation is not locked (WCAG criterion undetermined)",
   "description": "Element with orientation is not locked. Detected by Siteimprove Alfa rule sia-r59 on 2 of 3333 scanned pages (2 instances).",
   "remediation_tip": null,
   "suggested_fix": "See remediation guidance: https://alfa.siteimprove.com/rules/sia-r59",
   "expected_behavior": "Element passes Siteimprove Alfa rule sia-r59.",
   "actual_behavior": "Element with orientation is not locked. Detected by Siteimprove Alfa rule sia-r59 on 2 of 3333 scanned pages (2 instances).",
   "testing_environment": "Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/virtual-tour",
    "http://mailto:RADxInfo@nih.gov/virtual-tour"
   ],
   "html_fragments": [],
   "url_patterns": [
    {
     "pattern": "/virtual-tour",
     "count": 2
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [],
    "summary": "Not captured by automated scan — requires manual testing."
   }
  },
  {
   "finding_id": "VS-aa242c2d",
   "fingerprint": "9bf7674d",
   "rule_id": "sia-r87",
   "rule_label": "First focusable element is link to main content",
   "engine": "alfa",
   "tool": "Siteimprove Alfa",
   "wcag_sc": null,
   "wcag_name": null,
   "wcag_level": null,
   "wcag_version": null,
   "wcag_category": "Undetermined",
   "rule_url": "https://alfa.siteimprove.com/rules/sia-r87",
   "severity": "Moderate",
   "priority": "p3",
   "confidence": "low",
   "rationale": "persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W29",
    "last_observed": "2026-W29",
    "weeks_observed": 1,
    "affected_pages_current": 2,
    "affected_pages_previous": null
   },
   "frequency": {
    "instances": 2,
    "pages_affected": 2,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "First focusable element is link to main content (WCAG criterion undetermined)",
   "description": "First focusable element is link to main content. Detected by Siteimprove Alfa rule sia-r87 on 2 of 3333 scanned pages (2 instances).",
   "remediation_tip": null,
   "suggested_fix": "See remediation guidance: https://alfa.siteimprove.com/rules/sia-r87",
   "expected_behavior": "Element passes Siteimprove Alfa rule sia-r87.",
   "actual_behavior": "First focusable element is link to main content. Detected by Siteimprove Alfa rule sia-r87 on 2 of 3333 scanned pages (2 instances).",
   "testing_environment": "Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://www.nih.gov/virtual-tour",
    "http://mailto:RADxInfo@nih.gov/virtual-tour"
   ],
   "html_fragments": [],
   "url_patterns": [
    {
     "pattern": "/virtual-tour",
     "count": 2
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [],
    "summary": "Not captured by automated scan — requires manual testing."
   }
  },
  {
   "finding_id": "VS-4fac2f41",
   "fingerprint": "550210da",
   "rule_id": "aria-allowed-role",
   "rule_label": "ARIA role should be appropriate for the element",
   "engine": "axe-core",
   "tool": "axe-core",
   "wcag_sc": null,
   "wcag_name": null,
   "wcag_level": null,
   "wcag_version": null,
   "wcag_category": "Best Practice",
   "rule_url": "https://dequeuniversity.com/rules/axe/4.12/aria-allowed-role?application=axeAPI",
   "severity": "Minor",
   "priority": "p4",
   "confidence": "medium",
   "rationale": "persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W29",
    "last_observed": "2026-W29",
    "weeks_observed": 1,
    "affected_pages_current": 3,
    "affected_pages_previous": null
   },
   "frequency": {
    "instances": 3,
    "pages_affected": 3,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "ARIA role should be appropriate for the element (WCAG criterion undetermined)",
   "description": "ARIA role should be appropriate for the element. Detected by axe-core rule aria-allowed-role on 3 of 3333 scanned pages (3 instances).",
   "remediation_tip": "Remove or change the ARIA role — it isn't allowed on this element type.",
   "suggested_fix": "See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/aria-allowed-role?application=axeAPI",
   "expected_behavior": "Element passes axe-core rule aria-allowed-role.",
   "actual_behavior": "ARIA role should be appropriate for the element. Detected by axe-core rule aria-allowed-role on 3 of 3333 scanned pages (3 instances).",
   "testing_environment": "Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://nih.gov/virtual-tour",
    "https://www.nih.gov/virtual-tour",
    "http://mailto:RADxInfo@nih.gov/virtual-tour"
   ],
   "html_fragments": [
    {
     "fingerprint": "3d546a25",
     "html": "<video class=\"ct-app-background__media--video\" autoplay=\"\" muted=\"\" loop=\"\" crossorigin=\"anonymous\" playsinline=\"\" role=\"presentation\">\n\t\t\t\t\t\t\t<source src=\"https://nih.hostexp.com/videos/VID_202209131",
     "selectors": [
      "video"
     ]
    }
   ],
   "url_patterns": [
    {
     "pattern": "/virtual-tour",
     "count": 3
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [],
    "summary": "Not captured by automated scan — requires manual testing."
   }
  },
  {
   "finding_id": "VS-f528778d",
   "fingerprint": "042912c2",
   "rule_id": "image-redundant-alt",
   "rule_label": "Alternative text of images should not be repeated as text",
   "engine": "axe-core",
   "tool": "axe-core",
   "wcag_sc": null,
   "wcag_name": null,
   "wcag_level": null,
   "wcag_version": null,
   "wcag_category": "Best Practice",
   "rule_url": "https://dequeuniversity.com/rules/axe/4.12/image-redundant-alt?application=axeAPI",
   "severity": "Minor",
   "priority": "p4",
   "confidence": "low",
   "rationale": "persistent across weeks",
   "trend": {
    "status": "persistent",
    "first_observed": "2026-W29",
    "last_observed": "2026-W29",
    "weeks_observed": 1,
    "affected_pages_current": 2,
    "affected_pages_previous": null
   },
   "frequency": {
    "instances": 6,
    "pages_affected": 2,
    "total_pages_scanned": 3333
   },
   "on_key_page": false,
   "summary": "Alternative text of images should not be repeated as text (WCAG criterion undetermined)",
   "description": "Alternative text of images should not be repeated as text. Detected by axe-core rule image-redundant-alt on 2 of 3333 scanned pages (6 instances).",
   "remediation_tip": null,
   "suggested_fix": "See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/image-redundant-alt?application=axeAPI",
   "expected_behavior": "Element passes axe-core rule image-redundant-alt.",
   "actual_behavior": "Alternative text of images should not be repeated as text. Detected by axe-core rule image-redundant-alt on 2 of 3333 scanned pages (6 instances).",
   "testing_environment": "Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.",
   "representative_urls": [
    "https://nih.gov/institutes-nih/nih-office-director/office-communications-public-liaison/clear-communication",
    "https://www.nih.gov/institutes-nih/nih-office-director/office-communications-public-liaison/clear-communication"
   ],
   "html_fragments": [
    {
     "fingerprint": "1b0f0f88",
     "html": "<img loading=\"eager\" srcset=\"/sites/default/files/styles/teaser_900x527/public/2025-02/clear-comm-health-literacy_0.jpg?itok=WgUQl-_B 1x\" width=\"900\" height=\"auto\" src=\"/sites/default/files/styles/tea",
     "selectors": [
      "img[alt=\"Health Literacy\"]"
     ]
    },
    {
     "fingerprint": "80119f1e",
     "html": "<img loading=\"eager\" srcset=\"/sites/default/files...\" width=\"900\" height=\"auto\" src=\"/sites/default/files...\" alt=\"Plain Language\" title=\"clear-comm-plain-lan...\">",
     "selectors": [
      "img[alt=\"Plain Language\"]"
     ]
    },
    {
     "fingerprint": "be28d124",
     "html": "<img loading=\"eager\" srcset=\"/sites/default/files...\" width=\"900\" height=\"auto\" src=\"/sites/default/files...\" alt=\"Resources for Effect...\" title=\"clear-comm-resources...\">",
     "selectors": [
      "img[title=\"clear-comm-resources.jpg\"]"
     ]
    }
   ],
   "url_patterns": [
    {
     "pattern": "/institutes-nih/nih-office-director/office-communications-public-liaison/clear-communication",
     "count": 2
    }
   ],
   "associated_technologies": [],
   "impact": {
    "groups": [],
    "summary": "Not captured by automated scan — requires manual testing."
   }
  }
 ],
 "clusters": {
  "by_wcag_criterion": [
   {
    "cluster_id": "77bde739",
    "type": "wcag_criterion",
    "wcag_sc": "1.4.1",
    "wcag_name": "Use of Color",
    "wcag_level": "A",
    "findings": [
     "VS-8ade3360",
     "VS-efd91fdd"
    ],
    "total_pages_affected": 4681,
    "max_severity": "Critical"
   },
   {
    "cluster_id": "0649d9b9",
    "type": "wcag_criterion",
    "wcag_sc": null,
    "wcag_name": null,
    "wcag_level": null,
    "findings": [
     "VS-f18df681"
    ],
    "total_pages_affected": 3122,
    "max_severity": "Serious"
   },
   {
    "cluster_id": "e08c8d69",
    "type": "wcag_criterion",
    "wcag_sc": null,
    "wcag_name": null,
    "wcag_level": null,
    "findings": [
     "VS-d25f622d"
    ],
    "total_pages_affected": 2300,
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  ]
 },
 "technology_findings": [],
 "third_party_findings": [
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   "pages_with_findings": 775,
   "finding_co_occurrence_rate": 1,
   "median_bytes": 599767,
   "example_pages": [
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    "https://www.nih.gov/news-events/nih-research-matters/how-exercise-can-protect-against-alzheimers",
    "https://nih.gov/brain/research/systems-neuroscience"
   ]
  },
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   "pages_with_findings": 775,
   "finding_co_occurrence_rate": 1,
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   "example_pages": [
    "https://www.nih.gov/about-nih/science-health-public-trust/checklist-communicating-science-health-research-public",
    "https://www.nih.gov/news-events/nih-research-matters/how-exercise-can-protect-against-alzheimers",
    "https://nih.gov/brain/research/systems-neuroscience"
   ]
  },
  {
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   "pages_with_findings": 775,
   "finding_co_occurrence_rate": 1,
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   "example_pages": [
    "https://www.nih.gov/about-nih/science-health-public-trust/checklist-communicating-science-health-research-public",
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    "https://nih.gov/brain/research/systems-neuroscience"
   ]
  },
  {
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   "pages_served": 774,
   "pages_with_findings": 774,
   "finding_co_occurrence_rate": 1,
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   "example_pages": [
    "https://www.nih.gov/about-nih/science-health-public-trust/checklist-communicating-science-health-research-public",
    "https://www.nih.gov/news-events/nih-research-matters/how-exercise-can-protect-against-alzheimers",
    "https://nih.gov/brain/research/systems-neuroscience"
   ]
  },
  {
   "origin": "digitalgov.gov",
   "pages_served": 774,
   "pages_with_findings": 774,
   "finding_co_occurrence_rate": 1,
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   "example_pages": [
    "https://www.nih.gov/about-nih/science-health-public-trust/checklist-communicating-science-health-research-public",
    "https://www.nih.gov/news-events/nih-research-matters/how-exercise-can-protect-against-alzheimers",
    "https://nih.gov/brain/research/systems-neuroscience"
   ]
  }
 ],
 "metadata": {
  "generator": "vital-core",
  "schema_version": "0.1",
  "total_pages_scanned": 3333,
  "notes": [
   "Healthy pages (no known issues) are intentionally excluded.",
   "Representative examples are used instead of complete occurrence lists.",
   "Fingerprints are stable hashes for tracking recurring patterns over time.",
   "Fragment fingerprints normalize volatile attributes (id, style, data-*) before hashing.",
   "Technology lift values indicate association, not causation.",
   "Confidence reflects sample size: high=10+ affected pages, medium=3-9, low=1-2."
  ]
 }
}