Three of those US airports — John F. Kennedy International Airport in New York, Los Angeles International Airport and San Francisco International Airport — are already checking those incoming passengers for symptoms such as fever, cough and trouble breathing.
By the end of this week, two more airports will screen passengers — Hartsfield-Jackson Atlanta International Airport and Chicago O’Hare International Airport.
Officials at Seattle-Tacoma International Airport put up signs at the international arrivals area instructing travelers from Wuhan to watch for symptoms of the virus. The Centers for Disease Control and Prevention started displaying the sign in English and Chinese on January 14, an airport spokesman said.
A sign at the international arrivals area of Seattle-Tacoma International Airport instructs travelers coming from Wuhan, China, to watch for symptoms of coronavirus.
But these airport screenings might not catch everyone infected. That’s because the incubation period can last a week
— meaning it can take a week after getting infected before showing any symptoms.
What scientists are doing
Across the US, scientists are trying to create a vaccine for the new virus. But don’t expect it anytime soon.
The National Institutes of Health is working on one, but it will take at least a few months before clinical trials start and more than a year until a vaccine might actually become available.
Separately, scientists in Texas, New York and China are also trying to create on a vaccine, said Dr. Peter Hotez, a vaccine scientist at Baylor College of Medicine in Houston.
But the challenge is daunting.
«The lesson we’ve learned is coronavirus infections are serious and one of the newest and biggest global health threats,» Hotez said.
What you can do yourself
Avoid close contact with anyone showing symptoms of respiratory illness, such as coughing and sneezing, the World Health Organization
Other symptoms of this coronavirus include fever and shortness of breath. Severe cases can lead to pneumonia, kidney failure and even death.
Anyone with underlying medical conditions should avoid live animal markets and raw meats altogether, since those people are «considered at higher risk of severe disease,» the World Health Organization says says.
But, in general, the public should do «what you do every cold and flu season,» said Dr. John Wiesman, the health secretary in Washington state — where the first US case of Wuhan coronavirus
That includes washing your hands often with soap and water for at least 20 seconds.
If you’re the one feeling sick, cover your mouth and nose when you cough or sneeze, and disinfect the objects and surfaces you touch.
What could happen next
That designation would include global recommendations for helping stop the virus.
But WHO Director-General Tedros Adhanom Ghebreyesus postponed the decision.
«The decision about whether or not to declare a public health emergency of international concern is one I take extremely seriously, and one I am only prepared to make with appropriate consideration of all the evidence,» he said Wednesday evening.
«This an evolving and complex situation.»
WHO officials are expected to meet again Thursday to continue the discussion.
CNN’s Michael Nedelman, Jen Christensen, Meera Senthilingam, Steven Jiang and Elizabeth Cohen contributed to this report.