"Avoid travel to these destinations. If you must travel to these destinations, make sure you are fully vaccinated before travel," the CDC said in an advisory.
Starting Tuesday, the CDC also recommends avoiding travel to Bahrain, Bermuda, Bolivia, Cape Verde, Albania, Grenada, Guyana, Panama, Qatar, Suriname, the Bahamas, Uruguay, and others.
There are a total of 101 countries in the highest Level 4 category of COVID-19 risk amid a surge in the number of Omicron variant-related cases.