March 12, 2020
The ban applies to travellers from countries which are members of the Schengen border-free travel area.
The UK, Ireland and other non-Schengen countries are unaffected. US citizens are also exempt.
The EU condemned the measures, which it said were taken "unilaterally and without consultation".
The new rules go into effect on Friday at midnight EDT (0400 GMT) and mark a major escalation from the US president, who has been accused of inaction over the coronavirus.
There are 1,135 confirmed cases of the virus across the US, with 38 deaths so far.
Shares around the world fell further following Mr Trump's announcement. At the start of US trading, shares plunged triggering an automatic temporary suspension in trading aimed at curbing panicky selling.