President of the United States, Joe Biden, has tested positive for Covid-19, the White House said Thursday.

The 79-year-old president, who is fully vaccinated and has received two Covid booster shots, is experiencing “very mild symptoms,” press secretary Karine Jean-Pierre said in a statement.

Biden has begun taking Paxlovid, an antiviral pill that can reduce the risk of hospitalization for people who test positive for Covid, the press secretary said.

Biden will work in isolation until he tests negative for the virus, Jean-Pierre said. He will hold all of his planned meetings remotely Thursday.

Read the full statement from the White House:

This morning, President Biden tested positive for COVID-19.  He is fully vaccinated and twice boosted and experiencing very mild symptoms.  He has begun taking Paxlovid. Consistent with CDC guidelines, he will isolate at the White House and will continue to carry out all of his duties fully during that time.  He has been in contact with members of the White House staff by phone this morning, and will participate in his planned meetings at the White House this morning via phone and Zoom from the residence.

Consistent with White House protocol for positive COVID cases, which goes above and beyond CDC guidance, he will continue to work in isolation until he tests negative.  Once he tests negative, he will return to in-person work.

Out of an abundance of transparency, the White House will provide a daily update on the President’s status as he continues to carry out the full duties of the office while in isolation.

Per standard protocol for any positive case at the White House, the White House Medical Unit will inform all close contacts of the President during the day today, including any Members of Congress and any members of the press who interacted with the President during yesterday’s travel.  The President’s last previous test for COVID was Tuesday, when he had a negative test result.