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“Rapid tests often aren’t positive on the first day of symptoms,” Sax said. “It often takes day two or three or four” for the test to pick up enough of the virus for a positive result.
A person may test positive because they are still shedding viable virus, or it could be viral debris that is being picked up by the test, says Amesh A. Adalja, M.D., senior scholar at the Johns ...
“So I don't think you have to put forward the results of your cancer test, but I do think if you're HIV-positive, COVID-positive or have herpes, you definitely should be telling others and ...
In the event that your test is negative even though you have noticeable COVID-like symptoms or you were exposed to someone with a confirmed case, the FDA now recommends taking a second test two ...
What To Do If You Test Positive For COVID-19 On An At-Home Test First, your best bet is to believe the test is correct. "Rapid at-home tests produce results within 10 to 15 minutes," Dr. Patel says.
Dr. Leana Wen, an emergency physician, explains what to do if you or someone in your household tests positive for COVID-19 around the holidays.
In the event your results are negative, the Food and Drug Administration recommends testing again in 48 hours and, possibly, a third test another 48 hours later. "If you know you had a positive ...
If you find out the test is past its shelf life, it’s best to avoid using it. “COVID-19 tests and the parts they are made of may degrade, or break down, over time,” officials wrote.