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All of this 6ft, 12ft business-it's pretty arbitrary. There is a probability of transmission, and it will decrease "continuously" with distance (and also lots of other factors) That is, there is not some sharp cutoff distance beyond which it is safe. Similarly, the laughably naive policies limiting the number of people in a gathering. Those numbers - which varied wildly - were arbitrary, with no "safe" cutoff. More is bad, fewer is less bad but still bad, zero is best, and the only guarantee. The way all that has been communicated to the public, and we can to that the nonsense about masks not being in interest of public health, is one aspect of the failure of the US response.
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