Coronavirus can be contagious during a Paxlovid rebound, researchers warn, even if people don't have symptoms

Coronavirus can be contagious during a Paxlovid rebound, researchers warn, even if people don't have symptoms

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Key Facts

  • CNN — People who have a Covid-19 rebound after treatment with the antiviral drug Paxlovid can be contagious and may not know it because they might not have symptoms, researchers warn.
  • Genetic testing suggests that when people get a second round of Covid-19 after Paxlovid, it’s not because they’ve been infected by a different strain of the virus.
  • But then in some people – no one knows how many, because not enough people have been studied – levels of the virus begin to climb again nine to 12 days after they first test positive, Charness said.
  • In studies of more than 2,200 Covid-19 patients, Pfizer, the company that makes the drug, said there were a few patients who had their Covid-19 come bouncing back after a negative test, but they were in the group that took Paxlovid as well as in those who got the placebo, suggesting that Covid just reappears in some people, even without treatment.

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