Figure 4.

The experimental methods used in this study. (A) The aerosolization experiments involved spraying (A-1), elution (A-2), and serial dilution (A-3). (B) Microtube experiments with high viral load and serial dilution at specific time of sampling. About 100 µL of the liquid samples with different SOP were drawn and diluted. (C) Samples were then combined with a pre-cultured host. (C-1) PFU counting was done on the following day (C-2). In the figure, panels marked with A and B are being performed separately; those marked with C were performed after A and B are done.