U.S. President Donald Trump and Vice President Mike Pence spoke at the CPAC, which took place from Feb. 26 to Feb. 29. The White House has said there is no indication either of them "met with or were in close proximity to the attendee."

White House press secretary Stephanie Grisham said Monday that Trump wasn't concerned about the potential of being exposed at the CPAC, saying that "people are taking appropriate precautions."

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

Congresswoman Julia Brownley announced Monday that she will self-quarantine after she interacted with a person in Washington, D.C., who tested positive for COVID-19 last week.

The California Democrat also said she is closing her Washington D.C. office this week after the interaction with the individual who is currently self-quarantining. She is the first Democratic lawmaker in Congress to self-quarantine.

As of Monday evening, there are over 600 confirmed cases of COVID-19 in the United States and 22 deaths, according to real-time data maintained by the Center for Systems Science and Engineering at Johns Hopkins University.

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