Updated details as of this morning:
Foreign nationals will not be able to use the UK, or a non-European or European-exempt country, as a pass-through to get to the United States.
Homeland Security confirmed foreign nationals who have been in any of the banned 26 European nations in the previous two weeks will be denied entry into the states. This is for all foreign nationals and not specific to Europeans.
The 26 countries are all in the Schengen Area, and includes:
Austria, Belgium, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, and Switzerland.
Along with the UK, the countries of Ireland, Croatia, Cyprus, Bulgaria and Romania are excluded from the travel ban.
This is restrictions on people coming in, not goods. Trade not impacted.
Americans, legal U.S. residents, and (in most cases) immediate family of Americans can still leave Europe and return to the U.S., but will be required to depart from specific airports as directed by the U.S. government and will undergo a health screening before departure.
Currently the ban is set for 30 days starting tomorrow. Could be shortened or extended