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A comment on SARS-CoV-2 was already spreading in France in late December 2019. Parent comment
Rush hour on a subway is about as close as your going to get (no pun intended) to a clear cut ‘yep, this is how it spread’.
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Rush hour on a subway is about as close as your going to get (no pun intended) to a clear cut ‘yep, this is how it spread’.