Your Coronavirus Test Is Positive. Maybe It Shouldn’t Be.

Created: 2020-09-06T20:34:00+00:00

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PCR testing

The C.D.C.’s own calculations suggest that it is extremely difficult to detect any live virus in a sample above a threshold of 33 cycles. Officials at some state labs said the C.D.C. had not asked them to note threshold values or to share them with contact-tracing organizations.