Fig. 3: Infectious virus shedding in ferrets.

A/H1N1 virus (a), SARS-CoV-2 (b), and SARS-CoV (c) titers were detected in the throat (gray) and nasal (white) swabs collected from inoculated donor (bars) and indirect recipient (circles) ferrets. An individual donor-recipient pair is shown in each panel. The dotted line indicates the detection limit.