Sourced of - https://www.zerohedge.com/covid-19/bombshell-admission-cdc-drops-post-isolation-pcr-test-because-they-can-remain-positive-12 "We know it performs really well during that period where you're initially infected, but the FDA has not at all looked at whether … your positive antigen really does correlate with whether you're transmissible or not." 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. "Since it wasn't going to make a difference in our recommendations, we did not recommend an antigen at that period of time," Walensky said. 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. -CBS News NYU infectious diseases specialist Dr. Celine Gounder slammed the FDA for not doing more due diligence on antigen tests. "Frankly, the FDA has had two years to do these assessments that Dr. Walensky is referring to: whether they're as good to make that initial diagnosis to say you're contagious as they are for saying you are no longer contagious," said Gounder Wednesday on "CBS Mornings." "They've had two years and have been dragging their feet for two years."