The US President was treated with antiviral medication Paxlovid and tested negative four times. He's among the small percentage of patients whose coronavirus test was positive again.
But Dr O'Connor said Mr Biden kept up testing because of "the potential for so-called 'rebound' COVID positivity observed in a small percentage of patients treated with Paxlovid".But Mr Biden went back into isolation after"This in fact represents 'rebound' positivity," Dr O'Connor said.What is COVID rebound?"...
a recurrence of COVID-19 symptoms or a new positive viral test after having tested negative.", according to a CDC advisory published in late May:with SARS-CoV-2 or the development of resistance to Paxlovid."The CDC also said a brief resurgence of symptoms might "be part of the natural history" of the virus that causes COVID-19 for some people, regardless of their vaccination status or whether or not they've had Paxlovid.
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