In this week’s edition of the Covid Q&A, we dive into how to know you’re really Covid negative. In hopes of making this very confusing time just a little less so, each week Bloomberg Prognosis picks one reader question and puts it to experts in the field. This week’s question comes to us from Christy in Waddington, New York. She asks:

My husband tested positive a few weeks ago. The last two days he has had a negative home test. Today we both took PCR tests. The nurse said his PCR will probably be positive for up to 90 days. Is he still contagious with a negative antigen test and a positive PCR test?

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