www.cdc.gov: Accessibility Conformance Report

Week: 2026-W27  ·  Report date: 2026-07-18

1667 pages scanned; axe-core ran on 1582 pages, Siteimprove Alfa on 781 pages.

Note: Automated tools find roughly a third of real barriers. This report must be supplemented with manual AT testing and user research before making conformance claims. “Supports” means no automated failure was detected this week, not that the criterion is fully met.

Level A Success Criteria

CriteriaConformance LevelRemarks and Explanations
1.1.1 Non-text Content Does Not Support Automated scan found failures on 352 of 1582 tested pages (engines: axe-core, Alfa). Example: https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.htm
1.2.1 Audio-only and Video-only (Prerecorded) Not Evaluated Not evaluated by automated engines this week. Manual testing required.
1.2.2 Captions (Prerecorded) Not Evaluated Not evaluated by automated engines this week. Manual testing required.
1.2.3 Audio Description or Media Alternative (Prerecorded) Not Evaluated Not evaluated by automated engines this week. Manual testing required.
1.3.1 Info and Relationships Does Not Support Automated scan found failures on 80 of 1582 tested pages (engines: axe-core, Alfa). Example: https://www.cdc.gov/infection-control/hcp/healthcare-personnel-epidemiology-control/measles.html
1.3.2 Meaningful Sequence Not Evaluated Not evaluated by automated engines this week. Manual testing required.
1.3.3 Sensory Characteristics Not Evaluated Not evaluated by automated engines this week. Manual testing required.
1.4.1 Use of Color Partially Supports Automated scan found failures on 25 of 1582 tested pages (engines: axe-core, Alfa). Example: https://www.cdc.gov/infection-control/hcp/healthcare-personnel-epidemiology-control/measles.html
1.4.2 Audio Control Not Evaluated Not evaluated by automated engines this week. Manual testing required.
2.1.1 Keyboard Partially Supports Automated scan found failures on 5 of 1582 tested pages (engines: axe-core). Example: https://www.cdc.gov/tb/hcp/treatment/tuberculosis-disease.html
2.1.2 No Keyboard Trap Not Evaluated Not evaluated by automated engines this week. Manual testing required.
2.1.4 Character Key Shortcuts Not Evaluated Not evaluated by automated engines this week. Manual testing required.
2.2.1 Timing Adjustable Not Evaluated Not evaluated by automated engines this week. Manual testing required.
2.2.2 Pause, Stop, Hide Partially Supports Automated scan found failures on 9 of 1582 tested pages (engines: axe-core). Example: https://www.cdc.gov/mmwr/preview/mmwrhtml/rr5407a1.htm
2.3.1 Three Flashes or Below Threshold Not Evaluated Not evaluated by automated engines this week. Manual testing required.
2.4.1 Bypass Blocks Not Evaluated Not evaluated by automated engines this week. Manual testing required.
2.4.2 Page Titled Partially Supports Automated scan found failures on 1 of 1582 tested pages (engines: axe-core, Alfa). Example: https://www.cdc.gov/mmwr/preview/mmwrhtml/mm5906a6.htm
2.4.3 Focus Order Not Evaluated Not evaluated by automated engines this week. Manual testing required.
2.4.4 Link Purpose (In Context) Does Not Support Automated scan found failures on 120 of 1582 tested pages (engines: axe-core, Alfa). Example: https://www.cdc.gov/pcd/issues/2012/11_0127_es.htm
2.5.1 Pointer Gestures Not Evaluated Not evaluated by automated engines this week. Manual testing required.
2.5.2 Pointer Cancellation Not Evaluated Not evaluated by automated engines this week. Manual testing required.
2.5.3 Label in Name Partially Supports Automated scan found failures on 78 of 1582 tested pages (engines: Alfa). Example: https://www.cdc.gov/ecoli/outbreaks/map-organic-walnuts-04-24.html
2.5.4 Motion Actuation Not Evaluated Not evaluated by automated engines this week. Manual testing required.
3.1.1 Language of Page Does Not Support Automated scan found failures on 333 of 1582 tested pages (engines: axe-core, Alfa). Example: https://www.cdc.gov/mmwr/preview/mmwrhtml/00050429.htm
3.2.1 On Focus Not Evaluated Not evaluated by automated engines this week. Manual testing required.
3.2.2 On Input Not Evaluated Not evaluated by automated engines this week. Manual testing required.
3.2.6 Consistent Help Not Evaluated Not evaluated by automated engines this week. Manual testing required.
3.3.1 Error Identification Not Evaluated Not evaluated by automated engines this week. Manual testing required.
3.3.2 Labels or Instructions Not Evaluated Not evaluated by automated engines this week. Manual testing required.
3.3.7 Redundant Entry Not Evaluated Not evaluated by automated engines this week. Manual testing required.
4.1.2 Name, Role, Value Partially Supports Automated scan found failures on 65 of 1582 tested pages (engines: axe-core, Alfa). Example: https://www.cdc.gov/mmwr/preview/mmwrhtml/mm6019a2.htm?s_cid=mm6019a2_w

Level AA Success Criteria

CriteriaConformance LevelRemarks and Explanations
1.2.4 Captions (Live) Not Evaluated Not evaluated by automated engines this week. Manual testing required.
1.2.5 Audio Description (Prerecorded) Not Evaluated Not evaluated by automated engines this week. Manual testing required.
1.3.4 Orientation Not Evaluated Not evaluated by automated engines this week. Manual testing required.
1.3.5 Identify Input Purpose Not Evaluated Not evaluated by automated engines this week. Manual testing required.
1.4.3 Contrast (Minimum) Does Not Support Automated scan found failures on 372 of 1582 tested pages (engines: axe-core, Alfa). Example: https://www.cdc.gov/pcd/issues/2012/11_0127_es.htm
1.4.4 Resize Text Not Evaluated Not evaluated by automated engines this week. Manual testing required.
1.4.5 Images of Text Not Evaluated Not evaluated by automated engines this week. Manual testing required.
1.4.10 Reflow Not Evaluated Not evaluated by automated engines this week. Manual testing required.
1.4.11 Non-text Contrast Not Evaluated Not evaluated by automated engines this week. Manual testing required.
1.4.12 Text Spacing Not Evaluated Not evaluated by automated engines this week. Manual testing required.
1.4.13 Content on Hover or Focus Not Evaluated Not evaluated by automated engines this week. Manual testing required.
2.4.5 Multiple Ways Not Evaluated Not evaluated by automated engines this week. Manual testing required.
2.4.6 Headings and Labels Not Evaluated Not evaluated by automated engines this week. Manual testing required.
2.4.7 Focus Visible Not Evaluated Not evaluated by automated engines this week. Manual testing required.
2.4.11 Focus Not Obscured (Minimum) Not Evaluated Not evaluated by automated engines this week. Manual testing required.
2.5.7 Dragging Movements Not Evaluated Not evaluated by automated engines this week. Manual testing required.
2.5.8 Target Size (Minimum) Does Not Support Automated scan found failures on 285 of 1582 tested pages (engines: Alfa). Example: https://www.cdc.gov/nchs/nsfg/key_statistics/i-keystat.htm
3.1.2 Language of Parts Not Evaluated Not evaluated by automated engines this week. Manual testing required.
3.2.3 Consistent Navigation Not Evaluated Not evaluated by automated engines this week. Manual testing required.
3.2.4 Consistent Identification Not Evaluated Not evaluated by automated engines this week. Manual testing required.
3.3.3 Error Suggestion Not Evaluated Not evaluated by automated engines this week. Manual testing required.
3.3.4 Error Prevention (Legal, Financial, Data) Not Evaluated Not evaluated by automated engines this week. Manual testing required.
3.3.8 Accessible Authentication (Minimum) Not Evaluated Not evaluated by automated engines this week. Manual testing required.
4.1.3 Status Messages Not Evaluated Not evaluated by automated engines this week. Manual testing required.