LOS ANGELES, CA — Current screening of travelers for the 2019 coronavirus is likely to miss most of the infected travelers, according to research by to UCLA scientists. That's because most infected travelers are not showing symptoms of the virus and don't realize they have been exposed.

To protect the community from outbreak, enhanced screening methods at airports and other travel hubs are necessary, according to researchers. Similar to the way health officials respond to measles infections, authorities should follow up with travelers and trace their contacts, they concluded. "This puts the onus on government officials and public health officials to follow up with travelers after they arrive, to isolate them and trace their contacts if they get sick later," said Professor James Lloyd- Smith, a UCLA professor of ecology and evolutionary biology.

Many governments have started to impose quarantines, or even travel bans, as they realize that screening is not sufficient to stop the spread of the coronavirus. But in developing nations, a lack of infrastructure and resources for such measures make those countries vulnerable to importing the disease, Lloyd-Smith said. "Much of the public health world is very concerned about the virus being introduced into Africa or India, where large populations exist do not have access to advanced medical care," he said.