South Korea Requiring Negative Coronavirus Test for Travelers from Four Countries

Some how the United States is not on this list?:

 South Korea on Monday started to require foreigners arriving from high-risk countries to submit a certificate showing they tested negative for the new coronavirus, as a steady rise in imported cases has strained its anti-virus fight.

All foreign arrivals from the four countries — Bangladesh, Pakistan, Kazakhstan, and Kyrgyzstan — are obligated to hand in health certificates proving they have tested negative for COVID-19 on a polymerase chain reaction (PCR) test. 

South Korea has also ordered regular flights from such countries to limit the number of passengers to 60 percent of capacity. Those who depart for countries with large outbreaks will face strict entry processes when returning to South Korea, health authorities said.

Yonhap

You can read more at the link, but it looks like the 14 day mandatory quarantine is not working to stop new infections.