After Republican leaders gathered for the Conservative Political Action Conference near Washington, D.C., new reports of possible contact with a confirmed coronavirus patient there have spurred most — but not all — to self-quarantine.

While the CPAC website lists 17 members of Congress as speakers for the event, only six have reported publicly that they had contact with the attendee who later tested positive for the coronavirus in New Jersey, according to the American Conservative Union, which puts on CPAC. The latest to announce he had interacted with the infected attendee was incoming White House chief of staff Rep. Mark Meadows (N.C.), who took a preliminary test, which came back negative, according to his spokesman Ben Williamson. Still, he opted to self-quarantine.

Other Republicans who have chosen to self-quarantine — Sen. Ted Cruz (Tex.), Rep. Paul A. Gosar (Ariz.), Rep. Douglas A. Collins (Ga.) and Rep. Matt Gaetz (Fla.) — have also said they aren’t symptomatic.

Collins and Gaetz interacted with President Trump after the conference. Collins was pictured shaking hands with Trump during the president’s visit to the Centers for Disease Control and Prevention headquarters in Atlanta, and Gaetz flew back from Florida to Washington on Air Force One with Trump.

Hours after his flight, Gaetz said he would close his Washington office for the remainder of his quarantine.

White House press secretary Stephanie Grisham told Fox News on Monday that the administration wasn’t concerned Trump would get sick, alluding to his famed germaphobia.

“The president of the United States, as we all know, is quite a hand washer,” she said.

Cruz tweeted that he shook hands and had a brief conversation lasting less than a minute with the patient. He said he would remain home in Texas until 14 days had passed from the interaction.

The only Republican congressman who has said publicly that he had close contact with the infected attendee but won’t quarantine himself was Texas Rep. Louie Gohmert, who cited a CDC physician’s advice in a tweet on Monday.