It’s Day 6 of Covid, and a Rapid Antigen Test Comes Back Positive. Stay Home, Say Virologists. 2022-02-02 By Tim Dunham http://: https://khn.org/news/article/rapid-antigen-test-isolation-guidance/ Filed Under: Categories: News More from Dittmer Lab Kaposi Sarcoma remains common in persons living with HIV UNC research program studies COVID-19 variants How worried do you need to be about the BA.2 coronavirus variant?