Biden Tests Negative for Covid-19 After Rebound Case, White House Doctor Says

President Biden tested negative for Covid-19 Saturday after a rebound case, but will remain in isolation until he has a second negative test, his physician said in a letter. Dr. Kevin O’Connor said in a letter made public by the White House that Mr. Biden tested negative on an antigen test and “continues to feel very well.” A White House official said a second test was planned for Sunday morning. Mr. Biden first tested positive for Covid-19 on July 21 and tested negative five days later following treatment with the antiviral drug Paxlovid. But he tested positive again on July 30, in what his doctor described as a rebound case. Following the positive test, Mr. Biden returned to isolation at the White House residence.