US will require COVID-19 testing for travelers from China

The U.S. announced new COVID-19 testing requirements Wednesday for all travelers from China, joining other nations imposing restrictions because of a surge of infections.

The increase in cases across China follows the rollback of the nation's strict anti-virus controls. China's “zero COVID” policies had kept the country's infection rate low but fueled public frustration and crushed economic growth.

The new U.S. requirements, which start Jan. 5, apply to travelers regardless of their nationality and vaccination status.

In a statement explaining the testing, the U.S. Centers for Disease Control and Prevention cited the surge in infections and what it said was a lack of adequate and transparent information from China, including genomic sequencing on the viral strains circulating in the country.

“These data are critical to monitor the case surge effectively and decrease the chance for entry of a novel variant of concern,” the CDC said.

Some scientists are worried the COVID-19 surge in China could unleash a new coronavirus variant on the world that may or may not be similar to the ones circulating now. That’s because every infection is another chance for the virus to mutate.

“What we want to avoid is having a variant enter into the U.S. and spread like we saw with delta or omicron,” said Matthew Binnicker, director of clinical virology at Mayo Clinic in Rochester, Minnesota.

But the CDC's action may be less about stopping a new variant from crossing U.S. borders and more about increasing pressure on China to share more information, said Dr. David Dowdy, an infectious disease epidemiologist at Johns Hopkins Bloomberg School of Public Health, adding he hopes the restrictions "aren’t kept in place longer than they need to be.”

“I don’t think it’s going to have a major impact...