US President Joe Biden tested positive for the coronavirus again on Sunday, one day after it was discovered that he had contracted the disease again just days after being given a clean bill of health following a coronavirus infection earlier this month. Biden’s physician, Kevin O’Connor, said in a statement that the president “continues to feel well” and will remain in strict isolation. After the US leader tested positive on Saturday, O’Connor said that rebound infections are common in patients like Biden, who were treated with Paxlovid, an antiviral medication. Biden initially tested positive…