Biden took two antigen tests, one Tuesday evening and one Wednesday morning, both of which were negative, Dr. Kevin O’Connor wrote in a memo to White House press secretary Karine Jean-Pierre.
The president will wear a tight-fitting mask for 10 days to prevent the spread of the virus, and he will increase the frequency with which he is tested for a possible resurgence of the virus.
O’Connor cited the potential for the president to experience a “rebound” in his Covid-19 infection after Biden was given the antiviral drug Paxlovid when explaining the more frequent testing. O’Connor noted that there was a small percentage of patients who were treated with Paxlovid who experienced a rebound in their infection.
The president is expected to speak at 11:30 a.m. ET about Covid-19 from the White House Rose Garden, according to a White House official.
“The President will comment after testing negative on a case that was mild thanks to the tools this administration has worked hard to make available to the American people. He will discuss the progress we have made against Covid and encourage eligible Americans to get vaccinated and boosted,” a White House official told CNN.
Biden tweeted a photo of his negative Covid-19 test on Wednesday morning and wrote, “Back to the Oval. Thank you Doc for the good care and all of you for your support.”
The president tested positive on Thursday and had mild symptoms including a runny nose, fatigue, a high temperature and a cough, according to his doctor. He continued to recover and work in isolation at the White House residence, and on Tuesday felt well enough to resume training at the executive mansion’s gym.
Biden, who is 79 and at high risk for serious illness, is fully vaccinated and has received two boosters. He received his first two doses of the Pfizer/BioNTech Covid-19 vaccine before its inauguration in January 2021, his first booster in September and his second booster in March.
The president took a five-day course of Paxlovid, which requires a doctor’s prescription and is available through a US Food and Drug Administration emergency use authorization for the treatment of mild Covid-19. to moderate in people 12 years of age and older who are at high risk of severe disease.
First lady Jill Biden was considered a close contact for the president, but her office says she continues to test negative. Jill Biden is in Wilmington, Delaware. Vice President Kamala Harris was also considered a close contact but continues to test negative. Harris tested positive for Covid-19 in April and her office says she did not experience symptoms.
This story has been updated with additional information.
CNN’s MJ Lee contributed to this report.