Three key U.S. officials guiding the coronavirus response were in self-quarantine on Saturday after coming into contact with someone who had tested positive for COVID-19, according to spokesmen and media reports.

Anthony Fauci, a high-profile member of the White House coronavirus response team, is considered to be at relatively low risk based on the degree of his exposure, according to a representative for the National Institute of Allergy and Infectious Diseases (NIAID).

Fauci, the 79-year-old NIAID director, has tested negative for COVID-19 and he will continue to be tested regularly, the official said in an emailed statement.