US President Joe Biden has tested negative for Covid-19 after testing positive with a breakthrough case for days, the White House physician said on Saturday.
The Democratic president will remain in isolation until he tests negative on a second test, Dr Kevin O'Connor said in a letter, reports Reuters.
Biden, 79, emerged from isolation on Jul 27 after testing positive for COVID-19 for the first time on Jul 21. He tested positive again on Jul 30 in what O'Connor described as a "rebound" case seen in a small percentage of people who take the antiviral drug Paxlovid.