Figure 5.

Comparison of losses of SARS-CoV-2 infectivity in aerosol particle pre- and post-evaporation. Average losses of viral infectivity for all isolates of aerosolized SARS-CoV-2 measured pre-evaporation, following collection in a liquid impinger, and post-evaporation, following collection using PTFE filters, are shown. The average loss of viral infectivity measured pre-evaporation was −0.04 ± 0.25 log₁₀ TCID₅₀, which was not significantly different than zero (P = 0.41). The average loss of viral infectivity measured post-evaporation, after normalizing for physical losses, was −0.46 ± 0.17 log₁₀ TCID₅₀/L-air, significantly greater than the pooled value measured for the aerosol pre-evaporation (P < 0.0001).