She is suffering mild symptoms.

"After testing negative for Covid-19 on Monday during her regular testing cadence, the First Lady began to develop cold-like symptoms late in the evening. She tested negative again on a rapid antigen test, but a PCR test came back positive," Elizabeth Alexander, her communications director, told CNN.

The first lady, who is double vaccinated and twice boosted, is taking Paxlovid, Pfizer's antiviral drug, according to Alexander, who told CNN that Biden received her second booster shot in April.

A person close to the first lady told CNN Tuesday morning that Jill Biden is "feeling good" and has "common cold"-like symptoms.