Late Saturday morning, President Joe Biden tested positive for Covid again in a "rebound" case after testing negative several days in a row, his doctor said.
"After testing negative on Tuesday evening, Wednesday morning, Thursday morning and Friday morning, the President tested positive late Saturday morning, by antigen testing. This in fact represents 'rebound' positivity."
- Dr. Kevin O'Connor, White House physician
The 79-year-old president has not experienced any re-emergence of symptoms and is still in good health, according to Dr. Kevin O'Connor.
Biden, who is fully vaccinated and twice boosted, will return to strict isolation procedures, the doctor added.
On July 21, Biden tested positive for Covid during a routine test. He was then treated with the antiviral Paxlovid.
In Pfizer's clinical trial, around 1% to 2% of Paxlovid users have a "rebound" effect, people tested positive for Covid after initially having tested negative.
