The US president, 79, “has not had any recurrence of symptoms and continues to feel quite well,” White House physician Dr. Kevin O’Connor said. Biden also tested positive nine days ago, on July 21, when he was said to be “experiencing very mild symptoms.” The second confirmation of the virus is believed to be a “recovery” experienced by some patients, Dr O’Connor said. It’s something patients treated with an antiviral drug called Paxlovid — the drug the president took — can experience. In a tweet, Mr Biden said two positive tests in a row could happen to a “small minority of people”. He added: “I have no symptoms, but I will self-isolate for the safety of everyone around me. “I’m still at work and will be back on the road soon.” The president had tested negative for the past four days, Dr. O’Connor said. Given Mr. Biden’s lack of symptoms, there is no plan to restart treatment, the doctor added. Use Chrome browser for more accessible video player 0:22 July 21: ‘Keep the faith’: Biden on his diagnosis Biden’s schedule includes a trip to Michigan on Tuesday to push new legislation to boost the semiconductor industry — a visit announced earlier Saturday. After the initial positive test, the White House said the president continues to perform his duties “to the full.” Several members of the Biden administration and other senior officials in Washington have tested positive for the virus in recent months, including Vice President Kamala Harris, House Speaker Nancy Pelosi and Attorney General Merrick Garland.