U.S. health officials will begin immediately screening airline passengers arriving from central China for a new and deadly type of pneumonia-like illness. 

The virus has been linked to the deaths of two people in China. The U.S. Centers for Disease Control and Prevention (CDC) says travelers coming from the Chinese city of Wuhan will have their temperatures taken and be questioned about symptoms when they arrive at one of three international airports. 

Officials are expecting about 5,000 passengers will be screened over the next few weeks at New York City’s JFK International Airport, Los Angeles International Airport, and San Francisco International Airport. 

So far, 41 cases have been reported in Wuhan, among whom 12 have recovered and been discharged from the hospital, five remain in critical condition and two have died, according to the Wuhan Municipal Health Commission. 

Two cases of the virus were confirmed in Thailand. Both infected people were Chinese tourists who had recently arrived from Wuhan.