Most important property of aerosols is size. Bc mass increases with the diam^3, aerosol properties change dramatically w/ size
But real size for droplets falling that quickly is > 50 μm, so 10 times the size and 1000 (!) times the mass
Which is curious, given that pollen ranges in size from 15 to 200 μm! (sciencedirect.com/topics/agricul…).
Clearly we are as safe with these authors and aerosol mechanics as ppl would be if I just started giving medical advice.
I agree with that, but that is not what we think aerosols are doing for COVID-19. Aerosol transmission, but with much lower contagiousness than e.g. measles (ballpark x 20 less).
This is reflective of the same misunderstanding discussed above. No clear conclusions about the modes of transmission emerge from that observation.
Side point: “Reviewing the literature on large droplet transmission, one can find no direct evidence for large droplets as the route of transmission of any disease” sciencedirect.com/science/articl…
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