The new coronavirus that has emerged in China is able to be transmitted between humans, the country's health officials announced.
Live animals at a seafood market in the city of Wuhan were pinpointed as the likely source of the outbreak, but experts say a woman in South Korea has developed the deadly 2019-nCoV without any visits to similar settings.
On Tuesday, Wuhan's mayor announced the fifth and sixth deaths from 2019-nCoV, which was first recognized in late December. Fifteen health care workers have been stricken with the respiratory illness. One is in critical condition.
The World Health Organization has scheduled an emergency meeting for Wednesday to evaluate the outbreak.
Official reports says that 295 people have been infected with 2019-nCoV so far, including some in the major Chinese cities of Beijing and Shanghai, as well as in Thailand, Japan, and South Korea.
Workers at airports in China, Australia, South Korea, and Japan are now using temporal scanners or "temperature guns" to check would-be flyers for high temperatures. The practice is also in place for travelers from Wuhan at airports in three major U.S. cities: New York (JFK airport), San Francisco, and Los Angeles.