The Department of Homeland Security issued a statement Wednesday that Trump signed a presidential proclamation suspending the entry of most foreign nationals who have been in certain European countries known as the "Schengen area" in the previous 14 days.
Trump said during a Wednesday night address that the suspension would take effect Friday at midnight, but that it would not apply to the United Kingdom.
Trump also said there will be exemptions for Americans who have undergone appropriate screening. Homeland Security added that the suspension will not apply to legal permanent residents, immediate family members of U.S. citizens and certain other individuals.
In a tweet later Wednesday, Trump said the Europe restrictions would only apply to people, not goods.
However, passenger planes typically carry goods in their cargo holds.
The U.S. State Department late Wednesday also issued a global Level 3 health advisory telling U.S. citizens to reconsider travel abroad due to the global impact of COVID-19, or the coronavirus, because of quarantines in some areas and the possibility of travel restrictions in others. It advised travelers to visit travel.state.gov for individual travel advisories.
Delta announced earlier Wednesday that it is reducing service from Atlanta to Brussels, Paris, Munich, Dusseldorf and Madrid. The airline, the biggest by revenue, has already suspended all flights from Italy, including its Atlanta-Rome flight.
The airline also announced reductions on more than a dozen trans-Atlantic routes from other cities.