Dr. Anthony Fauci and two other members of the White House’s coronavirus task force have self-quarantined after they came in contact with someone who tested positive for coronavirus.

Fauci, 79, tested negative for Covid-19 and will continue to be tested regularly, according to a spokesperson for the National Institute of Allergy and Infectious Diseases, where he is a director.

Robert Redfield, the director of the Centers for Disease Control and Prevention, who is 68, “will be teleworking for the next two weeks” after a “low-risk exposure” on Wednesday to a person at the White House who has the disease, the Washington Post reported on Saturday, citing a spokesman.

US Food and Drug Administration (FDA) Commissioner Stephen Hahn, who is 60, is in self-quarantine for a couple of weeks after coming into contact with someone who tested positive for Covid-19, an FDA spokesman told Reuters.