Sen. Lamar Alexander will self-quarantine for two weeks after learning one of his staffers tested positive for the coronavirus on Sunday.

Alexander, a Republican lawmaker from Tennessee, is not exhibiting any symptoms and already tested negative for the illness on Thursday, his chief of staff, David Cleary, announced in a Sunday statement.

But, “after discussing this with the Senate’s attending physician, Senator Alexander, out of an abundance of caution, has decided not to return to Washington, DC, and will self-quarantine in Tennessee for 14 days,” Cleary said.

Alexander will chair Tuesday’s Senate health committee hearing remotely. White House coronavirus task force member Dr. Anthony Fauci is expected to testify at the hearing.

It was also revealed Sunday night that the Navy’s top admiral, Michael Gilday, will self-quarantine after coming into contact with a family member who tested positive for the virus, Politico reported.