The guidelines say people who test positive for COVID-19, but have no symptoms, can leave isolation after five days without testing again.
are drawing some criticism from medical experts for not requiring a negative test for asymptomatic patients to leave isolation. Some have speculated the lack of a testing requirement is due to a short supply of tests in the U.S."This really had nothing to do with supply.
As for antigen tests, which are less sensitive than PCR, medical experts don't know if they can determine if someone will transmit the virus toward the end of a period of infection, Walensky said. So, even if someone tests negative with an antigen test after five days of isolation, the CDC would still urge them to wear a mask to prevent possible spread.
However, she said antigen tests are"absolutely" recommended for individuals who are exposed to someone who has COVID-19. They should test five days after exposure or if they get symptoms, the CDC advises. Dr. Celine Gounder, an infectious disease specialist at NYU and Bellevue hospitals, criticized the FDA for not further assessing antigen tests.
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