Dr. Anthony Fauci, the president’s senior adviser on the pandemic, tested positive for COVID-19.
Fauci, 81, has not had close contact with President Joe Biden or other senior officials recently, according to the National Institute of Allergy and Infectious Diseases.
Fauci, who has mild symptoms, tested positive by a rapid antigen test, according to NIAID.
He is fully vaccinated and has received two reinforcements, NIAID said in a statement.
On June 11, Fauci attended Holy Cross College in Worcester, Massachusetts, where the university renamed the Anthony S. Fauci Integrated Science Complex. Fauci was seen with and without a mask in the photos.
Fauci told CNN last month that he had never tested positive for COVID-19.
In April, Fauci did not attend the White House correspondents’ dinner.
“Each of us, in our own personal way, has to do a risk assessment that we are willing to accept to become infected,” Fauci told CNN in April. “In general, the risk is low, but I have made a personal assessment. I am 81 years old, and if I become infected, I have a much higher risk.”
Fauci was due to appear before the Senate Committee on Health, Education, Labor and Pensions on Thursday to give an update on the federal response to the pandemic.
“Dr. Fauci will be isolated and will continue to work from home,” the statement said. “Dr. Fauci will follow the COVID-19 guidelines of the Centers for Disease Control and Prevention and his doctor’s medical advice and will return to the NIH when he is negative.”
Arielle Mitropoulos and Emily Shapiro of ABC News contributed to this report.