The number of confirmed cases of the new coronavirus in New York State doubled on Thursday to 22, with officials announcing 8 new cases in Westchester County, one on Long Island and two patients in NYC who are critically ill.

But the virus’s potential reach was underscored by a much larger number: The City Department of Health is keeping tabs on 2,773 New Yorkers currently in home isolation, most of them in self-quarantine, city officials said.
Most of those under self-quarantine have recently returned from the five countries where the outbreak has been most severe: China, Italy, Iran, South Korea and Japan, the New York City health commissioner, Dr. Oxiris Barbot, said.