The U.S. Department of State upgraded travel alerts for all countries around the world to the highest level of the `` Travel Prohibited '' level 4, Reuters reported.

This alert is a recommendation for US citizens going abroad, interpreted as a high-intensity measure to prevent the spread of Corona 19.

The US State Department raised its alerts to all countries to three levels last week, raising it to the highest level.

The State Department also recommended returning to Americans abroad.