Fig 3.
Analysis of aerosol volumes exhaled by influenza virus-infected and uninfected ferrets. The total aerosol volume exhaled (not the volume of air) from naive ferrets (triangles) or from ferrets inoculated with 102.7 to 107 PFU of virus IN (green) or by AR inhalation (orange) during normal breathing or sneezing (n = 4 [SI06, MX09, and BD11], 5 [PN99], 6 [TH04], and 11 [naive]) is shown. Total volumes were determined for aerosols 0.5 to 20 μm (A), 0.5 to 5 μm (B), and 0.5 to 1 μm (C) in size exhaled from individual animals. Collection procedures were performed at 2, 4, and 6 days after inoculation, but these time points are not distinguished. Mean values ± SDs are shown. The statistical significance of comparisons between human and avian influenza virus groups is shown; ns, not significant.