Your questions about the coronavirus, answered: Could you still test positive for Covid-19 months after the infection?

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Your questions about the coronavirus, answered: Could you still test positive for Covid-19 months after the infection?

This is more likely when using polymerase chain reaction (PCR) tests, which are the gold standard but are also very sensitive in detecting remains of the coronavirus. The test is designed to look for evidence of viral RNA — the genetic material of the coronavirus — and the human body can shed viral RNA for long periods of time as it clears the virus, said Jennifer Nuzzo, a senior scientist at the Johns Hopkins Center for Cancer Research. Health Security. But, she said, the test could simply detect fragments of RNA — not the whole, active virus, which would be needed to infect other individuals.

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