Articles / COVID: which test, when and why?
This week’s expert:
A/Prof Sanjaya Senanayake AO, Infectious Diseases Physician; Medical School, ANU
Drawn from an interview with A/Prof Senanayake by Dr Harry Nespolon on the Healthed podcast Going Viral.
• In an acute infection of COVID-19, the PCR test is most likely to be positive three days after the first symptoms develop.
• The PCR may be negative if done too early in the course of the disease, ie prior to symptoms developing.
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