Specific guidance.

Did you know immune-competent adults should not be infectious more than 10 days after COVID-19 symptom onset, while PCR testing detects noninfectious viral RNA up to 12 weeks after infection? Meaning it sure is sensitive but not very specific for contagious disease; in fact, the CDC recommends against re-testing asymptomatic patients infected within the past 90 days, an important point to avoid unnecessary delays in medical procedures. | Coffey, JAMA 2021


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