WASHINGTON — Florida Rep. Matt Gaetz jokingly wore a large gas mask on the House floor when the chamber voted on a coronavirus spending bill last Wednesday.

By Monday, his office announced the Florida lawmaker was in self-quarantine after coming into contact with a person who was diagnosed with the coronavirus at CPAC, a conservative political conference, almost two weeks ago.

“Congressman Gaetz was informed today that he came into contact with a CPAC attendee 11 days ago who tested positive for COVID-19,” his office tweeted Monday afternoon. “Congressman Gaetz had expected COVID-19 to impact Congress, given the elevated frequency of travel and human contact, and demonstrated his concern last week on the House Floor.”

Gaetz doesn’t have any symptoms of the coronavirus, his office said on Twitter, and he has been tested for the virus, but the results haven’t come back yet. He will remain in self-quarantine until later this week, after a two-week period since coming in contact with the person expires. Gaetz also said on Twitter that his DC office will be closed while the member is in quarantine, and that his district office in Pensacola, Florida, will remain open. One person from Gaetz’s district died from COVID-19 over the weekend.

Gaetz is one of four members of Congress currently in self-quarantine after interacting with a person diagnosed with the virus at CPAC last month. Republicans Sen. Ted Cruz of Texas and Rep. Paul Gosar of Arizona announced Sunday night that they were going into quarantine, and Rep. Doug Collins of Georgia announced he was going into quarantine Monday afternoon.

The CDC has recommended that, as coronavirus spreads, people avoid shaking hands. Last week, after the CPAC conference, Collins visited the CDC with President Donald Trump and shook hands with the president Friday.