At-Home COVID Tests Are Still Effective in 2023 - and You Can Still Get Them for Free | KQED
Briefly

Improving your sample collection for at-home tests will also improve your chances of getting an accurate result.For example, when swabbing the nostril, scrape the inner lining of the nose rather than just the snot and boogers hanging about.That's why antigen tests generally recommend you blow your nose before swabbing.
Read at KQED
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