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The C.D.C. updates its definition of ‘close contact’ in relation to infection risk.

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By BY GINA KOLATA from NYT World https://ift.tt/3jkCx9e
The C.D.C. updates its definition of ‘close contact’ in relation to infection risk. The C.D.C. updates its definition of ‘close contact’ in relation to infection risk. Reviewed by writer on October 22, 2020 Rating: 5

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