The first longitudinal, direct measure of the number of SARS-CoV-2 viral copies exhaled per minute over the course of the infection - from the first sign of symptoms until 20 days after - shows COVID patients exhale high numbers of virus during the first eight days after symptoms start, as high as 1,000 copies per minute, reports a new Northwestern Medicine study. On day eight, exhaled levels of virus drop steeply, down to near the limit of detection -an average of two copies exhaled per minute. Northwestern investigators tested breath samples - collected multiple times daily from 44 individuals - over the entire course of infection to determine when a person is most infectious.

https://www.miragenews.com/covid-patients-exhale-1000-virus-copiesmin-in-1080966/

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