Dear Physics Community,
In my message of March 20, I wrote that “International students cannot leave the country because of travel bans.”  I have since learned this is not universally true.  If you need to travel internationally, please check first with the consulate of the country you wish to travel to.  I will try to get better information for you, the State Department site seems only concerned with US Citizens.  I apologize for posting incorrect information.
UPDATE: I contacted Vivian Ruiz and David Elwell in ISO and they advised:
- view their country’s Embassy to confirm restrictions on entry to their country. Some are allowing citizens to return but may face a 2-week quarantine or isolation (similar to US citizens returning to the US).
 - check their airlines as there are daily changes to flight access.
 - If students have questions about their ability to return to the US, they should contact their ISO Advisor Point of Contact (http://iso.mit.edu/about/student-advisor.shtml).
 
Peter