As Omicron subvariants continue to spark an increase in COVID cases across the U.S., some people are finding that they are testing positive for long periods of time.
, which can accurately pinpoint people who carry high levels of the virus. Studies have suggested that most people stop testing positive on these tests within the first 10 days of infection.
The tricky aspect is that a negative antigen test appears to be a reliable indicator for negative viral cultures in a lab, but a positive test doesn’t necessarily predict positive viral cultures, the researchers found. Now researchers are trying to understand why some people test positive for longer periods of time. People with weaker immune systems tend to take longer to clear the virus, though some healthy and fully vaccinated people may continue to test positive. What’s more, those who had higher exposures to the coronavirus may take longer to clear it, some tests are more sensitive than others, and people likely swab their noses differently, the newspaper reported.
People who continue to have symptoms or are immunocompromised, for instance, may continue to shed viral particles for longer periods of time and should continue to isolate, thereported. Generally, healthy people who have recovered can end their isolation after 10 days but should continue to wear a well-fitting mask in public.
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