Updated

President Biden tested negative for COVID-19 but will continue to isolate in the White House until testing negative a second time, according to his physician.

Dr. Kevin O'Connor, physician to the president, said Biden "continues to feel very well." He tested positive last week after completing a Paxlovid treatment course in what doctors called a "rebound" case.

"Given his rebound positivity which we reported last Saturday, we have continued daily monitoring," O'Connor said. "This morning, his SARS-CoV-2 antigen testing was negative."

BIDEN TESTS POSITIVE FOR COVID-19 AGAIN, WILL CONTINUE WHITE HOUSE ISOLATION

"In an abundance of caution, the President will continue his strict isolation measures pending a second negative test as previously described," O'Connor said.

President Biden signs a bill at the White House

President Biden signs two bills aimed at combating fraud in the COVID-19 small business relief programs Friday, Aug. 5, 2022, at the White House in Washington. (AP Photo/Evan Vucci, Pool)

O’Connor said last week that Biden tested negative for COVID-19 on Tuesday evening, Wednesday morning, Thursday morning and Friday morning, but tested positive on Saturday morning by an antigen test. 

AFTER COVID LOCKDOWNS, TWITTER OUTRAGED AT REPORT THAT OFFICIALS WON'T STOP SEX PARTIES TO PREVENT MONKEYPOX

The president first tested positive for the coronavirus on July 21. 

President Biden video

President Biden posted a video to Twitter on Saturday afternoon after testing positive for COVID-19 in a "rebound" case. (President Biden/Twitter)

The president suffered body aches and a sore throat early into his infection last month.

O'Connor has said preliminary sequencing indicated Biden contracted the BA5 variant, the most common coronavirus variant in the U.S. right now.

Read the physician's letter:

CLICK HERE TO GET THE FOX NEWS APP

Dr. Marc Siegel, Fox News medical analyst and professor of medicine at New York University Langone Medical Center told Fox News Digital last week that the president wasn't setting a good example for following the CDC's COVID-19 guidelines.

"Not a good look for a president who talks about mandates. He has played too loose with this," Siegel said last Saturday. "The antigen test is predictive of low infectivity if negative but a high quality mask KN95 or better would have been a wise precaution."

White House press secretary Karine Jean-Pierre said that Biden was not wearing a mask on Wednesday because the group was socially distanced.