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Take precautions, test again 48 hours later, and if the second test is negative, take a third test 48 hours later. If you have no COVID symptoms without any known exposure , you probably don’t ...
How long are you going to test positive for COVID after taking a test? Two experts weigh in, and advise on testing and isolation guidelines to follow.
With the holidays coming up, here’s a refresher on when to test for COVID-19.
"The PCR test detects the virus's genetic material and can stay positive for up to 90 days, even if you’re no longer contagious," explains Dr. Raj Dasgupta, MD, a quadruple board-certified ...
Test errors can be false positives (the test is positive, but the virus is not present) or false negatives, (the test is negative, but the virus is present). [179] In a study of over 900,000 rapid antigen tests, false positives were found to occur at a rate of 0.05% or 1 in 2000.
Second, the person with a positive Antigen-RDT could be asymptomatic but a "contact of a probable or confirmed case." [10] Nevertheless, individual countries may have different case definitions of COVID-19; for example, in New Zealand a positive PCR test (not just a RAT) is necessary for a person to be considered a "confirmed case." [11]
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