It is the first longitudinal, direct measure of the number of SARS-CoV-2 viral copies exhaled per minute over the course of thedrop steeply, down to near the limit of detection—an average of two copies exhaled per minute.—collected multiple times daily from 44 individuals—over the entire course of infection to determine when a person is most infectious.
"An important question in understanding transmission of SARS-CoV-2 is how much virus a patient is exhaling into the environment over the course of their infection and for how long," said senior author Christina Zelano, assistant professor of neurology at Northwestern University Feinberg School of Medicine.
The study findings could be used to calculate the amount of time it takes for an individual to exhale an infectious dose of SARS-CoV-2, Lane.
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