www.cdc.gov: semaine 2026-W40
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Évolution cette semaine
- Nouveaux cette semaine
- 0
- Corrigés cette semaine
- 0
- Régressions cette semaine
- 6
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À corriger en priorité
| Problème | Gravité | Pages | Qui est touché | Comment corriger | Preuve |
|---|---|---|---|---|---|
| All page content should be contained by landmarks (WCAG criterion undetermined) (règle↗) | Grave | 1692 | — | Wrap all page content in landmarks (header, nav, main, footer) so users can navigate by region. | pages (CSV) |
| Images must have alternative text (WCAG 1.1.1) (règle↗) | Critique | 339 | Without vision, Limited vision | Give every <img> a meaningful alt attribute. Use alt="" only for decorative images so screen readers skip them. | pages (CSV) |
| Landmarks should have a unique role or role/label/title (i.e. accessible name) c (WCAG criterion undetermined) (règle↗) | Modéré | 584 | — | 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. | pages (CSV) |
| <html> element must have a lang attribute (WCAG 3.1.1) (règle↗) | Grave | 340 | Without vision, Limited cognitive, language, or learning ability | Add a lang attribute to <html> (e.g. lang="en"). | pages (CSV) |
| Heading levels should only increase by one (WCAG criterion undetermined) (règle↗) | Modéré | 512 | — | Use heading levels in order (h1 → h2 → h3) without skipping; structure, not size. | pages (CSV) |
| Elements must meet minimum color contrast ratio thresholds (WCAG 1.4.3) (règle↗) | Grave | 309 | Limited vision, Without color perception | 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. | pages (CSV) |
| Document should have one main landmark (WCAG criterion undetermined) (règle↗) | Modéré | 440 | — | Each page should have exactly one <main> landmark. | pages (CSV) |
| Target size is at least 44×44 CSS pixels (Enhanced) (WCAG 2.5.5) (règle↗) | Modéré | 416 | — | See remediation guidance: https://alfa.siteimprove.com/rules/sia-r111 | pages (CSV) |
Progression
| Semaine | Critique | Grave | Modéré | Mineur |
|---|---|---|---|---|
| 2026-W24 | 2 | 14 | 40 | 4 |
| 2026-W25 | 6 | 16 | 47 | 5 |
| 2026-W26 | 6 | 16 | 47 | 5 |
| 2026-W27 | 4 | 15 | 50 | 4 |
| 2026-W28 | 6 | 17 | 48 | 4 |
| 2026-W29 | 8 | 20 | 53 | 5 |
| 2026-W30 | 7 | 18 | 53 | 4 |
| 2026-W31 | 7 | 19 | 51 | 5 |
| 2026-W32 | 5 | 19 | 47 | 6 |
| 2026-W33 | 6 | 19 | 50 | 5 |
| 2026-W34 | 6 | 19 | 48 | 3 |
| 2026-W35 | 5 | 19 | 41 | 4 |
| 2026-W36 | 7 | 19 | 48 | 5 |
| 2026-W37 | 4 | 16 | 49 | 5 |
| 2026-W38 | 5 | 17 | 49 | 4 |
| 2026-W39 | 6 | 18 | 51 | 5 |
| 2026-W40 | 5 | 17 | 51 | 5 |
Dropped from this week's sample
- Grave VS-dd1c019f lang attribute must have a valid value (WCAG 3.1.2)
- Modéré VS-400f3a18 Element with lang attribute has correct language (WCAG 3.1.2)
- Mineur VS-f528778d Alternative text of images should not be repeated as text (WCAG criterion undetermined)
- Modéré VS-e43903a1 Form field error is identified and described (WCAG criterion undetermined)
- Modéré VS-33b49e3b Info and Relationships (WCAG 1.3.1)
- Modéré VS-58346bcf Keyboard (WCAG 2.1.1)
- Critique VS-af36d20c ARIA attributes must conform to valid values (WCAG 4.1.2)
- Grave VS-fa724f90 ARIA dialog and alertdialog nodes should have an accessible name (WCAG criterion undetermined)
Cette semaine en un coup d’œil 78 type(s) de problème
- Médiane des violations axe / page
- 5
- Pages avec violations axe
- 1693 sur 1693 CSV
- Médiane des échecs Alfa / page
- 79
- Pages avec échecs Alfa
- 418 sur 418 CSV
- Pages uniques auditées
- 1693
- Performance Lighthouse (médiane)
- 82/100 détails
- SEO Lighthouse (médiane)
- 100/100
- Bonnes pratiques Lighthouse (médiane)
- 100/100
- Agentique Lighthouse (médiane)
- 94/100
- Mots par page (médiane)
- 707
- Facilité de lecture (médiane)
- 44.2 détails
- Niveau de lecture (médiane)
- 12.5
- Fautes d'orthographe
- 25+ distinctes détails
- Liens brisés
- 411 détails
- Poids médian de page
- 5.1 Mo +83 KB pire
- Requêtes médianes par page
- 47
- Énergie estimée par page (moyenne)
- 1.5763 Wh
Remarque : le nombre de pages diffère d'une semaine à l'autre (3333 → 1948). Préférez les colonnes « pages concernées » aux comptes bruts d'occurrences pour comparer.
Couverture du scan cette semaine (1948 pages · 2345 réussies sur 2659 tentées)
| Moteur | Pages | Couverture |
|---|---|---|
| axe | 1693 | 87% |
| resources | 1693 | 87% |
| standards | 865 | 44% |
| plain-language | 849 | 44% |
| alfa | 418 | 21% |
| sustainability | 193 | 10% |
| security | 179 | 9% |
| tech | 176 | 9% |
| lighthouse | 166 | 9% |
| deprecated-html | 162 | 8% |
Changements depuis 2026-W39 16 changement(s)
axe-core
- New: landmark-main-is-top-level appeared this week.
- New: landmark-no-duplicate-main appeared this week.
- New: document-title appeared this week.
- New: presentation-role-conflict appeared this week.
- Resolved: aria-dialog-name no longer fails on any scanned page.
- Resolved: aria-valid-attr-value no longer fails on any scanned page.
- Resolved: valid-lang no longer fails on any scanned page.
- Resolved: image-redundant-alt no longer fails on any scanned page.
Alfa
- New: sia-r86 appeared this week.
- New: sia-r72 appeared this week.
- Resolved: sia-r76 no longer fails on any scanned page.
- Resolved: sia-r7 no longer fails on any scanned page.
- Resolved: sia-r84 no longer fails on any scanned page.
- Resolved: sia-r75 no longer fails on any scanned page.
- sia-r18 shrank: 365 → 222 pages affected (rate: 50% → 53% of pages scanned).
- sia-r69 shrank: 244 → 154 pages affected (rate: 33% → 37% of pages scanned).
Ressources intégrées et liées
Nouveaux cette semaine (1902)
- https://www.cdc.gov/diabetes/media/pdfs/2024/05/DMMP-Spanish-3-21-23.pdf
- https://www.cdc.gov/diabetes/media/pdfs/2024/05/spanish-504-plan.pdf
- http://www.cdc.gov/healthcare-associated-infections/media/pdfs/Health-Response-Prevent-MDRO-508.pdf
- http://www.cdc.gov/healthcare-associated-infections/media/pdfs/ARIE-Interim-Guidance-508.pdf
- http://www.cdc.gov/nchs/data/misc/adolescent2007.pdf
- http://www.cdc.gov/nchs/data/ahcd/agingtrends/09causes.pdf
- http://www.cdc.gov/nchs/data/ahcd/agingtrends/08influenza.pdf
- http://www.cdc.gov/nchs/data/ahcd/agingtrends/07olderwomen.pdf
- http://www.cdc.gov/nchs/data/ahcd/agingtrends/06olderpersons.pdf
- http://www.cdc.gov/nchs/data/ahcd/agingtrends/05medicine.pdf
- http://www.cdc.gov/nchs/data/ahcd/agingtrends/04nursin.pdf
- http://www.cdc.gov/nchs/data/ahcd/agingtrends/03oral.pdf
- http://www.cdc.gov/nchs/data/ahcd/agingtrends/02vision.pdf
- http://www.cdc.gov/nchs/data/ahcd/agingtrends/01death.pdf
- http://www.cdc.gov/nchs/data/nhanes/nhanesi/anthro.pdf
- http://www.cdc.gov/nchs/data/misc/assessphacc.pdf
- http://www.cdc.gov/nchs/data/misc/corltrtacc.pdf
- http://www.cdc.gov/nchs/data/misc/char1960acc.pdf
- http://www.cdc.gov/nchs/data/misc/nutri94acc.pdf
- http://www.cdc.gov/nchs/data/misc/legis99.pdf
- http://www.cdc.gov/nchs/data/misc/statinfacc.pdf
- http://www.cdc.gov/nchs/data/misc/elihealthdisp.pdf
- http://www.cdc.gov/nchs/data/misc/employer.pdf
- http://www.cdc.gov/nchs/data/misc/growork.pdf
- http://www.cdc.gov/nchs/data/misc/lbwork.pdf
- http://www.cdc.gov/nchs/data/misc/poolwork.pdf
- http://www.cdc.gov/nchs/data/misc/factsofliacc.pdf
- http://www.cdc.gov/nchs/data/misc/hb_fun.pdf
- http://www.cdc.gov/nchs/data/misc/hb_occup.pdf
- http://www.cdc.gov/nchs/data/misc/hb_itop.pdf
- http://www.cdc.gov/nchs/data/misc/hb_div.pdf
- http://www.cdc.gov/nchs/data/misc/hb_marr.pdf
- http://www.cdc.gov/nchs/data/misc/healthcare.pdf
- http://www.cdc.gov/nchs/data/misc/hincov.pdf
- http://www.cdc.gov/nchs/data/hsrmc/hsrmc_9th_proceedings_2007.pdf
- http://www.cdc.gov/nchs/data/hsrmc/hsrmc_8th_proceedings_2004.pdf
- http://www.cdc.gov/nchs/data/hsrmc/hsrmc_7th_proceedings_1999.pdf
- http://www.cdc.gov/nchs/data/hsrmc/hsrmc_6th_proceedings_1995.pdf
- http://www.cdc.gov/nchs/data/misc/hus2003excerpt.pdf
- http://www.cdc.gov/nchs/data/misc/hrt_booklet.PDF
- http://www.cdc.gov/nchs/data/misc/hospitalacc.pdf
- http://www.cdc.gov/nchs/data/misc/hb_birth.pdf
- http://www.cdc.gov/nchs/data/misc/ihdrg2003.pdf
- http://www.cdc.gov/nchs/data/misc/ihdrg2001.pdf
- http://www.cdc.gov/nchs/data/misc/ihdrg99.pdf
- http://www.cdc.gov/nchs/data/misc/ihdr97.pdf
- http://www.cdc.gov/nchs/data/misc/ihd_95.pdf
- http://www.cdc.gov/nchs/data/misc/inter5591acc.pdf
- http://www.cdc.gov/nchs/data/misc/mvsact92aacc.pdf
- http://www.cdc.gov/nchs/data/misc/mvsact77acc.pdf
- http://www.cdc.gov/nchs/data/misc/mortrenacc.pdf
- http://www.cdc.gov/nchs/data/injury/InjuryChartbook79-01.pdf
- http://www.cdc.gov/nchs/data/injury/injurychartbook79-01_front.pdf
- http://www.cdc.gov/nchs/data/injury/injurychartbook79-01_genstatistics.pdf
- http://www.cdc.gov/nchs/data/injury/injurychartbook79-01_injurydiag19-31.pdf
- http://www.cdc.gov/nchs/data/injury/injurychartbook79-01_injurydiag32-49.pdf
- http://www.cdc.gov/nchs/data/injury/injurychartbook79-01_injurydiag50-64.pdf
- http://www.cdc.gov/nchs/data/injury/injurychartbook79-01_utilpayment.pdf
- http://www.cdc.gov/nchs/data/injury/injurychartbook79-01_appendixes.pdf
- http://www.cdc.gov/nchs/data/misc/teenbrth.pdf
- http://www.cdc.gov/nchs/data/misc/proact02.pdf
- http://www.cdc.gov/nchs/data/misc/pr_act97.pdf
- http://www.cdc.gov/nchs/data/misc/staffmanual2004.pdf
- http://www.cdc.gov/nchs/data/misc/direc-99.pdf
- http://www.cdc.gov/nchs/data/misc/nutri98.pdf
- http://www.cdc.gov/nchs/data/misc/nutri93acc.pdf
- http://www.cdc.gov/nchs/data/misc/nutri92acc.pdf
- http://www.cdc.gov/nchs/data/misc/nutri89acc.pdf
- http://www.cdc.gov/nchs/data/misc/nutri86acc.pdf
- http://www.cdc.gov/nchs/data/misc/bds_02.pdf
- http://www.cdc.gov/nchs/data/misc/hb_cod.pdf
- http://www.cdc.gov/nchs/data/misc/employ2.pdf
- http://www.cdc.gov/nchs/data/misc/ice90_1acc.pdf
- http://www.cdc.gov/nchs/data/misc/ice90_2acc.pdf
- http://www.cdc.gov/nchs/data/misc/ice85_1acc.pdf
- http://www.cdc.gov/nchs/data/misc/ice2_85_2.pdf
- http://www.cdc.gov/nchs/data/misc/ice92_3acc.pdf
- http://www.cdc.gov/nchs/data/misc/ice95_1acc.pdf
- http://www.cdc.gov/nchs/data/phdsc/phdsc0206.pdf
- http://www.cdc.gov/nchs/data/misc/wedlock.pdf
- http://www.cdc.gov/nchs/data/misc/smoki01acc.pdf
- http://www.cdc.gov/nchs/data/misc/itop97.pdf
- http://www.cdc.gov/nchs/data/misc/STPI-Epi-Modeling-Summit-Report-01-14-2021.pdf
- http://www.cdc.gov/nchs/data/misc/25anniv.pdf
- http://www.cdc.gov/nchs/data/misc/icd_icda8.pdf
- http://www.cdc.gov/nchs/data/misc/tronm.pdf
- http://www.cdc.gov/nchs/data/misc/nutri95_1acc.pdf
- http://www.cdc.gov/nchs/data/misc/nutri95_2acc.pdf
- http://www.cdc.gov/nchs/data/healthywomen/womenschartbook_aug2004.pdf
- https://www.cdc.gov/acute-bronchitis/media/pdfs/Bronchitis-508.pdf
- http://www.cdc.gov/hepatitis-surveillance-prevention/media/files/2026/02/Sample-Work-Evaluation-Plan-Template-Comp-1.docx
- http://www.cdc.gov/hepatitis-surveillance-prevention/media/files/2026/02/Sample-Work-Evaluation-Plan-Template-Comp-2.docx
- http://www.cdc.gov/hepatitis-surveillance-prevention/media/files/2026/02/Sample-Work-Evaluation-Plan-Template-Comp-3.docx
- https://www.thecommunityguide.org/media/pdf/Oral-Health-Caries-School-based-Sealants_0.pdf
- https://www.thecommunityguide.org/media/pdf/Oral-Health-Caries-Community-Water-Fluoridation_2.pdf
- http://www.youtube-nocookie.com/embed/ZBcP08zEXLA?autohide=0&enablejsapi=1&modestbranding=1&rel=0&origin=https://www.cdc.gov?autohide=0&enablejsapi=1&modestbranding=1&rel=0&origin=https://www.cdc.gov&wmode=opaque?enablejsapi=1
- http://www.youtube-nocookie.com/embed/zaXQ2x3k9FI?autohide=0&enablejsapi=1&modestbranding=1&rel=0&origin=https://www.cdc.gov?autohide=0&enablejsapi=1&modestbranding=1&rel=0&origin=https://www.cdc.gov&wmode=opaque?enablejsapi=1
- http://www.cdc.gov/lyme/media/images/2026/07/NoTimeLyme_1200x675-X-Web-Branded_Lyme-Burden.jpg
- http://www.cdc.gov/lyme/media/images/2026/07/NoTimeLyme_1080x1080-FB-Branded_Lyme-Burden.jpg
- http://www.cdc.gov/lyme/media/images/2026/07/NoTimeLyme_1080x1350-IG-Branded_Lyme-Burden.jpg
| Type | Nombre |
|---|---|
| Documents PDF | 2391 |
| Images | 333 |
| Lecteurs multimédias intégrés | 120 |
| Tableurs | 77 |
| Fichiers vidéo | 56 |
| Iframes | 34 |
| Documents texte/Word | 23 |
| Présentations | 23 |
| Fichiers audio | 17 |
| Archives (zip, etc.) | 15 |