"About 56 percent of all the cases are coming out of that metro area," Birx added.
"It's a very serious situation," said Dr. Anthony Fauci.
"When they go to another place - for their own safety - they've got to be careful," Fauci said, echoing the call for those travelers to self-isolate for up to two weeks.
"We don't want that to be another seeding point for the rest of the country," Fauci added, talking about how people can spread the virus to other places, whether on Long Island, the Jersey Shore, or in Florida.
The Governor of Florida, Ron DeSantis, has been raising red flags about people traveling from New York to the Sunshine State, and possibly spreading the virus.
DeSantis has also asked New York travelers to self-isolate for 14 days, whether they are arriving by plane or car.