The EU is banning travellers from outside the bloc for 30 days in an unprecedented move to seal its borders amid the coronavirus crisis.
The measure is expected to apply to 26 EU states as well as Iceland, Liechtenstein, Norway and Switzerland. UK citizens will be unaffected.
The ban came as deaths continued to soar in Italy and Spain, and France began a strict lockdown.
Europe has been badly hit by the virus, which has killed 7,500 globally.
More than 185,000 people have been infected worldwide, according to the World Health Organization.
Meanwhile, the Euro 2020 football competition has been postponed by a year.