BGR has an article on the “scariest” mode of SARS-CoV2
transmission, aerosols, indicating CDC hasn’t been telling us.
Actually, The Hill (Peter Sullivan) noted just now
that CDC has finally updated its website with a “sometimes” CDC has somewhat downgraded the concerns
over fomites, indicating that transmission through surfaces is possible but
probably not common in high doses.
The BGR article refers to an MIT document on Google
Docs. The document explains that aerosol
transmission is possible without extreme infectiousness (in comparison to
measles). Pay close attention to pages
32 and 33, which give some practical advice over the relative risks of some
activities. There is a simulation
assuming 1% penetration in an area, and 30% effectiveness of masks (they should
do better than that) on p. 32. Riding
public transportation is safer than I had thought.
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