Understanding COVID-19

This will make a strong difference in airborne infectivity. Noteworthy, one droplet of 5 μm has enough room to host up to 4 x 105 virions; this is a concentration of ~0.8 x 108 /ml. Therefore, knowing that a concentration over 105/ml is considered infective (less than 100,000 RNA copies/ml are not considered a risk [ ................
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