President Joe Biden has likely been infected with the BA.5 omicron subvariant of COVID-19, which is currently the virus' most dominant strain in the U.S., his physician wrote in a memo. Kevin O'Connor, physician to the president, wrote in the memo that Biden's symptoms "continue to improve." Though "less troublesome," O'Connor said Biden's symptoms now include a sore throat, runny nose, loose cough and body aches. The president will continue with his treatment of the antiviral drug Paxlovid. "He is experiencing no shortness of breath at all," O'Connor's memo said. Biden, 79, tested positive for the virus on July 21. He will continue to work and isolate at the White House until he tests negative, White House press secretary Karine Jean-Pierre said.