The first lady had tested negative for three consecutive days on Tuesday, but tested positive once again on Wednesday. Biden's rebound case arrives weeks after President Biden himself had the same turn of events.
"After testing negative on Tuesday, just now, the first lady has tested positive for COVID-19 by antigen testing. This represents a 'rebound' positivity," the first lady's deputy communications director, Kelsey Donohue, announced in a statement.
"The first lady has experienced no reemergence of symptoms, and will remain in Delaware where she has reinitiated isolation procedures. The White House Medical Unit has conducted contact tracing and close contacts have been notified," Donohue went on.
WATCH: BRITAIN'S HEAVIEST MAN HAS PASSED AWAY AT 33
Both Bidens experienced minor-to-moderate symptoms throughout their first infections. Doctors treated the virus with Paxlovid in both cases. The president further reported few-to-no symptoms throughout his rebound case.
It is not uncommon for those treated with Paxlovid to have rebound cases within a few days of first testing negative.
PASTOR DODGES BULLET MID-SERMON AFTER MAN "SEES SPIRITS" AND OPENS FIRE
The first lady will remain in Delaware for no less than another five days. President Biden is scheduled to meet her there on Friday.
Jill Biden first tested positive on Aug. 15 throughout a family trip to Kiawah Island in North Carolina, a secluded and wealthy vacation spot.
WATCH: AT WHAT POINT WE WILL TAKE THEM SERIOUSLY?
The president reportedly tested negative on Wednesday yet will mask indoors for the next 10 days because of his close contact with the first lady.
Biden treated the virus with Paxlovid and underwent "cold-like" symptoms, according to the White House.
Her infection came weeks after President Biden contracted the virus twice in late July. White House Physician Kevin O'Connor announced the president suffered moderate symptoms. He had a rebound case days after testing negative for the virus, nonetheless, yet reportedly experienced no symptoms in that example. Biden nevertheless self-isolated until August 7.
JOHN FETTERMAN BELIEVES CAMPUS PROTESTS ARE "WORKING AGAINST PEACE" IN THE MIDDLE EAST
The Biden family spent last week at a private residence on Kiawah Island, a wealthy and secluded vacation spot.
The president's son, Hunter Biden, accompanied the first couple on Air Force One for the flight from Washington last week. Biden's daughter-in-law Melissa Cohen and grandson Beau further attended.
TARGETING DISSIDENTS: THEY ESCAPED THEIR HOMELANDS, BUT DANGER STILL LOOMS FOR THEM HERE, FBI SAYS
Late-summer vacations are typical for U.S. presidents. Former Presidents George W. Bush, Barack Obama and Donald Trump all took similar vacations throughout their time in office. Bush would often spend the time at his Texas ranch, while Obama and Trump both preferred golf resorts in New England.
Discover alternative ideas that will make you think
Engage in mind bending debate
Earn points, rise in rank, have fun
