My husband works with a Sudanese man whose wife came on CR1 visa late in 2019
she had to return to her country to take final exams for her college
she had not yet received her green card but went (with a return ticket) but was stuck there because of the virus
Happy to say last week the embassy arranged for her to return to the US and He did not pay extra for this service.
So, i am hoping soon all travel may resume and those with approved CR1 will travel / be safe please (get a mask and wear it in the airport and on the plane)
When we came back from France we were met when getting off the plane by federal officals that handed us a phamlet to self quarantine for 14 days (taking our temperature ) with full instructions on what to do and who to contact if there were any issues.