FDA Website - At Home COVID-19 Antigen Tests-Take Steps The FDA safety communication on at-home COVID-19 antigen tests explains that negative results can miss infections—especially early or in asymptomatic people—and recommends serial (repeat) testing 48 hours apart to reduce false negatives. It outlines practical testing schedules (two tests if symptomatic; three tests if exposed without symptoms), notes antigen tests are generally less sensitive than molecular PCR, and cites FDA-required follow-up studies and NIH-supported data that informed EUA labeling revisions on November 1, 2022. primary file regulatory fda-policy 2022-11-17_FDA Website - At Home COVID-19 Antigen Tests-Take Steps.md regulatory/fda-policy/2022-11-17_FDA Website - At Home COVID-19 Antigen Tests-Take Steps.md 2022_11_17 date converted 2024-06-04 website Public Domain 1537 2432 gfile-url xfile-github-download-url pdf-gdrive-url pdf-github-url github-markdown-url github-markdown-download-url web-pdf-url web-slides-url youtube-url web-url