By BY GINA KOLATA from NYT World https://ift.tt/3jkCx9e
Wednesday, 21 October 2020
The C.D.C. updates its definition of ‘close contact’ in relation to infection risk.
Posted by News On in: bbc news LONDON NEWS NYTBy BY GINA KOLATA from NYT World https://ift.tt/3jkCx9e
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