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. 2021 Jul;27(7):1979–1981. doi: 10.3201/eid2707.203948

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Viral RNA copies and size distribution of severe acute respiratory syndrome coronavirus 2 aerosols shed by experimentally infected cynomolgus monkeys. A) Viral RNA copies in aerosols directly expelled during 40 minutes of breathing. B) Size distribution of virus aerosols directly expelled during 40 minutes of breathing. C) Viral RNA copies in aerosols from the housing isolator during 30 minutes of sampling. D) Size distribution of virus aerosols in the isolator during 30 minutes of sampling. dpi, days postinfection. The pink dotted line indicates the limit of detection.