Your regular reminder that we've known for some time that SARS-CoV-2 isn't "airborne" in the colloquial sense, the debate is about communication rather than science
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True, but there are always a large fraction where the origin can't be identified. The point I made is relevant to large crowds where there might be someone infected upwind of you in almost any direction the wind might blow.
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Well in Australia the unknown contact cases make up only ~10% of all cases, not sure if that's a large fraction in this definition. And yes as I said it's ~possible~ but we're really more interested in whether it's likely or common
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