WASHINGTON — Jill Biden, the primary lady, tested negative for the coronavirus on Monday after a rebound case had forced her back into isolation, in keeping with the White House.
Dr. Biden first tested positive on Aug. 15 while on vacation with President Biden on Kiawah Island, S.C. Six days later, she received a second consecutive negative test and traveled to Delaware. She had to stay there after she tested positive again last Wednesday in what her office described as a rebound case. A spokeswoman for Dr. Biden said in a press release that the primary lady would return to the Washington area on Tuesday.
Mr. Biden also had a rebound case and needed to return to isolation. During their bouts with Covid-19, each the president and the primary lady took the antiviral treatment Paxlovid, which may reduce the consequences of the virus. But researchers are studying whether the medication can also result in a reoccurrence of symptoms or positive tests after patients initially test negative.
Experts have stressed that the medication is successful in stopping severe Covid-19 illness and hospitalizations. A study of Paxlovid and one other treatment, molnupiravir, that was published in June but has not yet been peer reviewed found that of 13,644 adults, about 5 percent tested positive again inside 30 days and 6 percent experienced symptoms again.
The primary lady’s office said Dr. Biden’s symptoms didn’t re-emerge when she tested positive again. She initially experienced mild, coldlike symptoms when she first tested positive. Each Mr. Biden, 79, and Dr. Biden, 71, have been vaccinated twice and received two booster shots.