{ "domain": "www.cdc.gov", "week": "2026-W27", "generatedAt": "2026-07-18T16:31:11.561Z", "reports": [ { "instance_id": "VS-5ff32d9b", "pattern_id": "VS-179ad9b3", "a11y_pattern_fingerprint": "23e04d47fe1576caf1b25264a15e75e5dd5325a3929a9d8f6341a583bc4abfa4", "a11y_pattern_display_id": "A11Y-PAT-23E04D47FE15", "a11y_occurrence_fingerprint": "a5802d8871cea14e4994c582b346e75d714e6f6a00fa37474b5426555def01c3", "a11y_occurrence_display_id": "A11Y-OCC-A5802D8871CE", "url": "https://www.cdc.gov/nchs/nsfg/key_statistics/i-keystat.htm", "xpath": "", "html_snippet": null, "wcag_sc": "2.5.8", "wcag_name": "Target Size (Minimum)", "wcag_level": "AA", "wcag_version": "2.2", "wcag_category": "WCAG 2.2 AA", "evidence_status": "automated-indicator", "rule_id": "sia-r113", "rule_label": "Target size is at least 24×24 CSS pixels or has spacing (Minimum)", "engine_key": "alfa", "tool": "Siteimprove Alfa", "rule_url": "https://alfa.siteimprove.com/rules/sia-r113", "severity": "Moderate", "frequency": { "instances": 2638, "pages_affected": 285, "total_pages_scanned": 1667 }, "likely_source": "template", "summary": "Target size is at least 24×24 CSS pixels or has spacing (Minimum) (WCAG 2.5.8)", "description": "Target size is at least 24×24 CSS pixels or has spacing (Minimum). Detected by Siteimprove Alfa rule sia-r113 on 285 of 1667 scanned pages (2638 instances).", "examples": [ { "url": "https://www.cdc.gov/nchs/nsfg/key_statistics/i-keystat.htm", "xpath": "", "html_snippet": null }, { "url": "https://www.cdc.gov/nchs/nsfg/key_statistics/i-keystat.htm", "xpath": "", "html_snippet": null }, { "url": "https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.htm", "xpath": "", "html_snippet": null }, { "url": "https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.htm", "xpath": "", "html_snippet": null }, { "url": "https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.htm", "xpath": "", "html_snippet": null } ], "example_pages": [ "https://www.cdc.gov/nchs/nsfg/key_statistics/i-keystat.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.htm", "https://www.cdc.gov/flu/spotlights/2020-2021/pediatric-flu-deaths.htm" ], "affected_pages": [ "https://www.cdc.gov/nchs/nsfg/key_statistics/i-keystat.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.htm", "https://www.cdc.gov/flu/spotlights/2020-2021/pediatric-flu-deaths.htm", "https://www.cdc.gov/pcd/issues/2008/jan/07_0154_fr.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5907a5.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5518a6.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/rr5407a1.htm", "https://www.cdc.gov/niosh/learning/safetyculturehc/module-4/9.html", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00032737.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00000707.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00016174.htm", "https://www.cdc.gov/nhsn/medication-safety-component/glycemic-control/index.html", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5720a1.htm", "https://www.cdc.gov/dpdx/diagnosticprocedures/other/urine.html", "https://www.cdc.gov/mmwr/index2006.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5210a3.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00015022.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5640md.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5249a2.htm", "https://www.cdc.gov/tobacco/campaign/tips/stories/jessica.html", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00020301.htm", "https://www.cdc.gov/pcd/issues/2008/oct/07_0167_fr.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6018a3.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5939a5.htm?s_cid=mm5939a5_w", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00026055.htm" ], "impact": { "groups": [ { "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 }, { "code": "LV", "group": "Limited vision", "prevalence": 0.024, "percent": "2.4%", "estimatedExcluded": null } ], "summary": "Affects Limited manipulation/strength (13.0%), Limited reach (2.0%), Limited vision (2.4%)." }, "testing_environment": "Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.", "steps_to_reproduce": [ "Open https://www.cdc.gov/nchs/nsfg/key_statistics/i-keystat.htm.", "Locate the element: ", "Confirm the Siteimprove Alfa finding for rule sia-r113 against WCAG 2.5.8 Target Size (Minimum)." ], "remediation_tip": null, "tech_name": null, "tech_remediation_tip": null, "suggested_fix": "See remediation guidance: https://alfa.siteimprove.com/rules/sia-r113", "obligation": "required", "handling": "review", "policy_source": "default", "policy_reason": null, "policy_evidence": [], "policy_owner": null, "policy_expires": null, "included_in_primary_score": false, "first_seen": "2026-W24", "last_seen": "2026-W27", "weeks_seen": 4, "affected_pages_csv": "csv/alfa__sia-r113.csv" }, { "instance_id": "VS-9722a47b", "pattern_id": "VS-f7dba940", "a11y_pattern_fingerprint": "c62043350a8d49ca1bac53cf7c839bffdc731a7dd796119e783a5ce0e41996a5", "a11y_pattern_display_id": "A11Y-PAT-C62043350A8D", "a11y_occurrence_fingerprint": "95c7303d6cb3e4d6e090a197eb3f27cb34a7ced68b18c93a7de3d539cb9fdbe7", "a11y_occurrence_display_id": "A11Y-OCC-95C7303D6CB3", "url": "https://www.cdc.gov/ecoli/outbreaks/map-organic-walnuts-04-24.html", "xpath": "E. coli Infection (Escherichia coli)\">", "html_snippet": null, "wcag_sc": "2.5.3", "wcag_name": "Label in Name", "wcag_level": "A", "wcag_version": "2.1", "wcag_category": "WCAG 2.1 A", "evidence_status": "automated-indicator", "rule_id": "sia-r14", "rule_label": "Accessible name of link or button matches visible label", "engine_key": "alfa", "tool": "Siteimprove Alfa", "rule_url": "https://alfa.siteimprove.com/rules/sia-r14", "severity": "Moderate", "frequency": { "instances": 132, "pages_affected": 78, "total_pages_scanned": 1667 }, "likely_source": "template", "summary": "Accessible name of link or button matches visible label (WCAG 2.5.3)", "description": "Accessible name of link or button matches visible label. Detected by Siteimprove Alfa rule sia-r14 on 78 of 1667 scanned pages (132 instances).", "examples": [ { "url": "https://www.cdc.gov/ecoli/outbreaks/map-organic-walnuts-04-24.html", "xpath": "E. coli Infection (Escherichia coli)\">", "html_snippet": null }, { "url": "https://www.cdc.gov/heat-health/es/hcp/toolkits/kit-de-herramientas-para-ninos-con-asma.html", "xpath": "", "html_snippet": null }, { "url": "https://www.cdc.gov/heat-health/es/hcp/toolkits/kit-de-herramientas-para-ninos-con-asma.html", "xpath": "", "html_snippet": null }, { "url": "https://www.cdc.gov/nis/about/index.html", "xpath": "", "html_snippet": null }, { "url": "https://www.cdc.gov/legionella/communication-resources/infographic.html", "xpath": "", "html_snippet": null } ], "example_pages": [ "https://www.cdc.gov/ecoli/outbreaks/map-organic-walnuts-04-24.html", "https://www.cdc.gov/heat-health/es/hcp/toolkits/kit-de-herramientas-para-ninos-con-asma.html", "https://www.cdc.gov/nis/about/index.html" ], "affected_pages": [ "https://www.cdc.gov/ecoli/outbreaks/map-organic-walnuts-04-24.html", "https://www.cdc.gov/heat-health/es/hcp/toolkits/kit-de-herramientas-para-ninos-con-asma.html", "https://www.cdc.gov/nis/about/index.html", "https://www.cdc.gov/legionella/communication-resources/infographic.html", "https://www.cdc.gov/tb/es/risk-factors/pais.html", "https://www.cdc.gov/naegleria/site.html", "https://www.cdc.gov/nora/councils/agff.html", "https://www.cdc.gov/global-water-sanitation-hygiene/es/stories/innovations-for-the-field.html", "https://www.cdc.gov/diabetes/es/about/acerca-de-los-niveles-bajos-de-azucar-en-la-sangre-hipoglucemia.html", "https://www.cdc.gov/data-interoperability/php/mdn/index.html", "https://www.cdc.gov/niosh/healthcare/hcp/pandemic/sharps-disposal-mass-vaccination.html", "https://www.cdc.gov/antimicrobial-resistance-laboratory-networks/site.html", "https://www.cdc.gov/spanish/NIOSH/docs/2002-101_sp", "http://www.cdc.gov/spanish/cdc/policies.html", "https://www.cdc.gov/uterine-cancer/es/resources/index.html", "https://www.cdc.gov/stillbirth/es/about/actividades-de-los-cdc.html", "https://www.cdc.gov/water-emergency/es/about/how-to-make-water-safe.html", "https://www.cdc.gov/drinking-water/es/about/water-quality-and-your-health.html", "https://www.cdc.gov/act-early/es/milestones-in-action/15-months.html", "https://www.cdc.gov/global-water-sanitation-hygiene/es/about/about-global-sanitation.html", "https://www.cdc.gov/spanish/NIOSH/docs/wp-solutions/2005-137_sp", "https://www.cdc.gov/diabetes/es/articles/articulos-sobre-la-diabetes.html", "https://www.cdc.gov/act-early/es/milestones-app/index.html", "https://www.cdc.gov/environmental-health-tracking/php/data-research/air-quality-outdoor.html", "https://www.cdc.gov/niosh/lead/programs/index.html" ], "impact": { "groups": [ { "code": "WV", "group": "Without vision", "prevalence": 0.01, "percent": "1.0%", "estimatedExcluded": null }, { "code": "WS", "group": "Without speech", "prevalence": 0.005, "percent": "0.5%", "estimatedExcluded": null } ], "summary": "Affects Without vision (1.0%), Without speech (0.5%)." }, "testing_environment": "Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.", "steps_to_reproduce": [ "Open https://www.cdc.gov/ecoli/outbreaks/map-organic-walnuts-04-24.html.", "Locate the element: E. coli Infection (Escherichia coli)\">", "Confirm the Siteimprove Alfa finding for rule sia-r14 against WCAG 2.5.3 Label in Name." ], "remediation_tip": null, "tech_name": null, "tech_remediation_tip": null, "suggested_fix": "See remediation guidance: https://alfa.siteimprove.com/rules/sia-r14", "obligation": "required", "handling": "review", "policy_source": "default", "policy_reason": null, "policy_evidence": [], "policy_owner": null, "policy_expires": null, "included_in_primary_score": false, "first_seen": "2026-W24", "last_seen": "2026-W27", "weeks_seen": 4, "affected_pages_csv": "csv/alfa__sia-r14.csv" }, { "instance_id": "VS-7d831a0d", "pattern_id": "VS-9074b4dd", "a11y_pattern_fingerprint": "a63aeb2e943401209ab1a27548f4db2826919c02cf8213d2900e7cb35f61d431", "a11y_pattern_display_id": "A11Y-PAT-A63AEB2E9434", "a11y_occurrence_fingerprint": "3b2211c6115b92b53b130ce39ba5a424971366383c02aad88bcbb62de69cfdb2", "a11y_occurrence_display_id": "A11Y-OCC-3B2211C6115B", "url": "https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.htm", "xpath": "td[rowspan=\"2\"][width=\"10\"]:nth-child(1) > img[alt=\" \"][width=\"10\"][src$=\"spacer.gif\"]", "html_snippet": "\"", "wcag_sc": "1.1.1", "wcag_name": "Non-text Content", "wcag_level": "A", "wcag_version": "2.0", "wcag_category": "WCAG 2.0 A", "evidence_status": "automated-indicator", "rule_id": "image-alt", "rule_label": "Images must have alternative text", "engine_key": "axe-core", "tool": "axe-core", "rule_url": "https://dequeuniversity.com/rules/axe/4.12/image-alt?application=axeAPI", "severity": "Critical", "frequency": { "instances": 3273, "pages_affected": 352, "total_pages_scanned": 1667 }, "likely_source": "template", "summary": "Images must have alternative text (WCAG 1.1.1)", "description": "Images must have alternative text. Detected by axe-core rule image-alt on 352 of 1667 scanned pages (3273 instances).", "examples": [ { "url": "https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.htm", "xpath": "td[rowspan=\"2\"][width=\"10\"]:nth-child(1) > img[alt=\" \"][width=\"10\"][src$=\"spacer.gif\"]", "html_snippet": "\"" }, { "url": "https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.htm", "xpath": "img[height=\"10\"][alt=\" \"][src$=\"spacer.gif\"]", "html_snippet": "\"" }, { "url": "https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.htm", "xpath": "td[rowspan=\"2\"][width=\"10\"]:nth-child(3) > img[alt=\" \"][width=\"10\"][src$=\"spacer.gif\"]", "html_snippet": "\"" }, { "url": "https://www.cdc.gov/mmwr/preview/mmwrhtml/00001976.htm", "xpath": "td[rowspan=\"2\"][width=\"10\"]:nth-child(1) > img[alt=\" \"][width=\"10\"][src$=\"spacer.gif\"]", "html_snippet": "\"" }, { "url": "https://www.cdc.gov/mmwr/preview/mmwrhtml/00001976.htm", "xpath": "img[height=\"10\"][alt=\" \"][src$=\"spacer.gif\"]", "html_snippet": "\"" } ], "example_pages": [ "https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00001976.htm", "https://www.cdc.gov/pcd/issues/2008/oct/07_0169_fr.htm" ], "affected_pages": [ "https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00001976.htm", "https://www.cdc.gov/pcd/issues/2008/oct/07_0169_fr.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5710md.htm", "https://www.cdc.gov/pcd/issues/2008/jan/07_0154_fr.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5827a4.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5518a6.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/rr5407a1.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00015682.htm", "https://www.cdc.gov/pcd/issues/2008/jan/06_0153_zhs.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00032737.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00000707.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5532a2.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00016174.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5715a5.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00018165.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00015131.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5720a1.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00047283.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00050544.htm", "https://www.cdc.gov/pcd/issues/2011/mar/10_0099_es.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5650a6.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00031075.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5210a3.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00015022.htm" ], "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%)." }, "testing_environment": "Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.", "steps_to_reproduce": [ "Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.htm.", "Locate the element: td[rowspan=\"2\"][width=\"10\"]:nth-child(1) > img[alt=\" \"][width=\"10\"][src$=\"spacer.gif\"]", "Confirm the axe-core finding for rule image-alt against WCAG 1.1.1 Non-text Content." ], "remediation_tip": "Give every a meaningful alt attribute. Use alt=\"\" only for decorative images so screen readers skip them.", "tech_name": null, "tech_remediation_tip": null, "suggested_fix": "See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/image-alt?application=axeAPI", "obligation": "required", "handling": "review", "policy_source": "default", "policy_reason": null, "policy_evidence": [], "policy_owner": null, "policy_expires": null, "included_in_primary_score": false, "first_seen": "2026-W24", "last_seen": "2026-W27", "weeks_seen": 4, "affected_pages_csv": "csv/axe-core__image-alt.csv" }, { "instance_id": "VS-079d1d57", "pattern_id": "VS-a24eaa8c", "a11y_pattern_fingerprint": "08fcf4104776325c4249523ea3a19eb9da7511b09ae3fe405e100fb8fe2dfcd4", "a11y_pattern_display_id": "A11Y-PAT-08FCF4104776", "a11y_occurrence_fingerprint": "6adc07a429487dc7a650ecc1c1469b3c1f1a4d969b1d67b3024faad289b60ca2", "a11y_occurrence_display_id": "A11Y-OCC-6ADC07A42948", "url": "https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.htm", "xpath": "\"", "html_snippet": null, "wcag_sc": "1.1.1", "wcag_name": "Non-text Content", "wcag_level": "A", "wcag_version": "2.0", "wcag_category": "WCAG 2.0 A", "evidence_status": "automated-indicator", "rule_id": "sia-r2", "rule_label": "Image has accessible name", "engine_key": "alfa", "tool": "Siteimprove Alfa", "rule_url": "https://alfa.siteimprove.com/rules/sia-r2", "severity": "Moderate", "frequency": { "instances": 1664, "pages_affected": 190, "total_pages_scanned": 1667 }, "likely_source": "template", "summary": "Image has accessible name (WCAG 1.1.1)", "description": "Image has accessible name. Detected by Siteimprove Alfa rule sia-r2 on 190 of 1667 scanned pages (1664 instances).", "examples": [ { "url": "https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.htm", "xpath": "\"", "html_snippet": null }, { "url": "https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.htm", "xpath": "\"", "html_snippet": null }, { "url": "https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.htm", "xpath": "\"", "html_snippet": null }, { "url": "https://www.cdc.gov/pcd/issues/2008/jan/07_0154_fr.htm", "xpath": "\"", "html_snippet": null }, { "url": "https://www.cdc.gov/pcd/issues/2008/jan/07_0154_fr.htm", "xpath": "\"", "html_snippet": null } ], "example_pages": [ "https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.htm", "https://www.cdc.gov/pcd/issues/2008/jan/07_0154_fr.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5518a6.htm" ], "affected_pages": [ "https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.htm", "https://www.cdc.gov/pcd/issues/2008/jan/07_0154_fr.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5518a6.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/rr5407a1.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00032737.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00000707.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00016174.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5720a1.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5210a3.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00015022.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5640md.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5249a2.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00020301.htm", "https://www.cdc.gov/pcd/issues/2008/oct/07_0167_fr.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00026055.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00019640.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00017935.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5701a8.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/ss5512a1.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00017263.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/00049990.htm", "https://www.cdc.gov/pcd/issues/2004/jul/cover.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5832a3.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5817a2.htm", "https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5511a7.htm" ], "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%)." }, "testing_environment": "Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.", "steps_to_reproduce": [ "Open https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.htm.", "Locate the element: \"", "Confirm the Siteimprove Alfa finding for rule sia-r2 against WCAG 1.1.1 Non-text Content." ], "remediation_tip": "Give every an accessible name (alt text), or alt=\"\" if purely decorative.", "tech_name": null, "tech_remediation_tip": null, "suggested_fix": "See remediation guidance: https://alfa.siteimprove.com/rules/sia-r2", "possible_duplicate_of": "VS-7d831a0d", "possible_duplicate_pattern": "VS-9074b4dd", "obligation": "required", "handling": "review", "policy_source": "default", "policy_reason": null, "policy_evidence": [], "policy_owner": null, "policy_expires": null, "included_in_primary_score": false, "first_seen": "2026-W24", "last_seen": "2026-W27", "weeks_seen": 4, "affected_pages_csv": "csv/alfa__sia-r2.csv" }, { "instance_id": "VS-5f94de7c", "pattern_id": "VS-9429bb8d", "a11y_pattern_fingerprint": "330493ada94348bd93e571f5da75ffc94f3ef547066d91735204bc002646ee37", "a11y_pattern_display_id": "A11Y-PAT-330493ADA943", "a11y_occurrence_fingerprint": "2f93d351fc35a6d2aabcd8256bece2d2682f471dfc78820b503eca2c3003b7dc", "a11y_occurrence_display_id": "A11Y-OCC-2F93D351FC35", "url": "https://www.cdc.gov/nhsn/training/continuing-edu/cbts.html", "xpath": "#accordion-8", "html_snippet": "
", "wcag_sc": "1.3.1", "wcag_name": "Info and Relationships", "wcag_level": "A", "wcag_version": "2.0", "wcag_category": "WCAG 2.0 A", "evidence_status": "automated-indicator", "rule_id": "aria-required-children", "rule_label": "Certain ARIA roles must contain particular children", "engine_key": "axe-core", "tool": "axe-core", "rule_url": "https://dequeuniversity.com/rules/axe/4.12/aria-required-children?application=axeAPI", "severity": "Critical", "frequency": { "instances": 14, "pages_affected": 1, "total_pages_scanned": 1667 }, "likely_source": "content", "summary": "Certain ARIA roles must contain particular children (WCAG 1.3.1)", "description": "Certain ARIA roles must contain particular children. Detected by axe-core rule aria-required-children on 1 of 1667 scanned pages (14 instances).", "examples": [ { "url": "https://www.cdc.gov/nhsn/training/continuing-edu/cbts.html", "xpath": "#accordion-8", "html_snippet": "
" }, { "url": "https://www.cdc.gov/nhsn/training/continuing-edu/cbts.html", "xpath": "#acc-panel-8", "html_snippet": "
" }, { "url": "https://www.cdc.gov/nhsn/training/continuing-edu/cbts.html", "xpath": "#accordion-9", "html_snippet": "
" } ], "example_pages": [ "https://www.cdc.gov/nhsn/training/continuing-edu/cbts.html" ], "affected_pages": [ "https://www.cdc.gov/nhsn/training/continuing-edu/cbts.html" ], "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%)." }, "testing_environment": "Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.", "steps_to_reproduce": [ "Open https://www.cdc.gov/nhsn/training/continuing-edu/cbts.html.", "Locate the element: #accordion-8", "Confirm the axe-core finding for rule aria-required-children against WCAG 1.3.1 Info and Relationships." ], "remediation_tip": "Add the child roles this container role requires (e.g. a list needs listitem children).", "tech_name": null, "tech_remediation_tip": null, "suggested_fix": "See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/aria-required-children?application=axeAPI", "obligation": "required", "handling": "review", "policy_source": "default", "policy_reason": null, "policy_evidence": [], "policy_owner": null, "policy_expires": null, "included_in_primary_score": false, "first_seen": "2026-W25", "last_seen": "2026-W27", "weeks_seen": 3, "affected_pages_csv": "csv/axe-core__aria-required-children.csv" }, { "instance_id": "VS-4c0a58b3", "pattern_id": "VS-a0bdbdf6", "a11y_pattern_fingerprint": "bcfe30ec9a8442a9eb94e890fee80706cc1636ff7f726219accd334d9aaf7637", "a11y_pattern_display_id": "A11Y-PAT-BCFE30EC9A84", "a11y_occurrence_fingerprint": "109866bdb6d6986479703c54d8e57730aaa0f345288c761815b69b5d0c953bed", "a11y_occurrence_display_id": "A11Y-OCC-109866BDB6D6", "url": "https://www.cdc.gov/infection-control/hcp/healthcare-personnel-epidemiology-control/measles.html", "xpath": "li:nth-child(3) > ul", "html_snippet": "
    ", "wcag_sc": "1.3.1", "wcag_name": "Info and Relationships", "wcag_level": "A", "wcag_version": "2.0", "wcag_category": "WCAG 2.0 A", "evidence_status": "automated-indicator", "rule_id": "list", "rule_label": "
      and
        must only directly contain
      1. ,