President Joe Biden tested positive for SARS-CoV-2 again on Monday, the White House announced — the third day in a row he tested positive after testing negative for 3 days last week.
Biden, who is fully vaccinated and has received two boosters, has a case of so-called “rebound” COVID-19, which has been reported in some patients after being treated with Paxlovid. He first tested positive on July 21 and experienced “very mild” symptoms, according to the White House.
“It’s unclear how common this effect is,” Amesh A. Adalja, MD, senior scholar at