The government is also extending mask rules for public transportation, including airplanes and buses, through March 18.

Here’s what we know so far about the travel ban.

Which countries have omicron?

It’s a different story for US citizens though (see the next section).

Yes,according to remarksmade by Biden on Friday.

US citizens and permanent residents may travel home with a negative COVID-19 test.

United will also restart service between Newark and Cape Town on Dec. 1, NBC reported.

When will the travel ban be lifted?

It’s unknown right now.

Do travel bans work?

Some say the US' travel restrictions are necessary to contain omicron,if not too narrow.

Ultimately, tracking omicron comes down to our ability to detect specific variants.

Non-citizens traveling from those countries are barred from entering the states.

But the US hasn’t banned Americans from traveling to those nations.

The State Department, however, isadvising against it.