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  2. 5 days ago · When are rapid antigen tests for COVID-19 most accurate? Rapid antigen tests are most accurate if you develop symptoms of a COVID-19 infection, or at least five days after a known exposure to someone who was sick.

  3. 5 days ago · In summary, among the universe of published autopsies performed after COVID-19 vaccination available to date, with a contemporary and independent review, we found that in 73.9% of cases, COVID-19 vaccination was the direct cause or significantly contributed to death. The consistency seen among cases in this review with previously reported COVID ...

  4. 5 days ago · New research shows that, in a head-to-head comparison of five tests used to detect COVID-19 antibodies (known as ‘immunoassays’), an assay manufactured by Siemens and one developed by an academic partnership led by the University of Oxford had the most accurate results.

  5. 5 days ago · Myth 5: I already had COVID-19, so I won’t benefit from the vaccine. It’s very possible to get COVID-19 more than once. Your body’s immunity from infection wanes over time, so the antibodies ...

  6. 5 days ago · If you test positive for COVID-19, you don't need to retest if your symptoms have cleared or are improving. However, you should take steps to prevent the spread of COVID-19 when you're sick.

  7. 1 day ago · Recent vaccination attenuated declines in spike levels from older infections. In a convenience sample, spike antibody and cellular responses were correlated. Near the end of 2022, about 35% of adults above age 60 had their last vaccine dose more than six months ago, and about 25% remained uninfected.

  8. 1 day ago · COVID-19 vaccines become less effective over time in terms of preventing infection and symptomatic disease 2, probably as a consequence of waning antibody-mediated neutralization 34, whereas ...

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