Here we consider the upper limit, i.e. 3000 particles in 72 µm droplet
(giving rise to 1010.18 virus copies per ml), as this
produces larger clusters of virus and hence less penetrating through
filters. Applying the drying kinetic model to droplet size distributions
given by Han et al.(3), the resulting particle size
distribution of the dried particles are predicted to be in the range
0.84-18 µm, as also shown in Figure 2.