It’s Day 6 of Covid, and a Rapid Antigen Test Comes Back Positive. Stay Home, Say Virologists.

Say you’re on Day 6 — or 8 or 10 — of a symptomatic covid infection, and a rapid antigen test comes back positive. Could the test just be detecting bits and pieces of dead virus? If you’re a petri dish, sure. But if you’re a human, chances are you’re still infectious. Virologists weigh in. (KHN, NBC)