The countries were added to the highest warning at a level four due to the rising levels of COVID-19.
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Some of the countries added include Israel, Australia, Egypt, Albania, Argentina, Uruguay, Panama, Qatar, the Bahamas, Bahrain, Bermuda, British Virgin Islands, Turks and Caicos Islands, Suriname, Saint Lucia and Bolivia, Reuters reported.
The level four rating now has more than 100 countries as nations struggle to combat the highly contagious omicron variant.
The CDC advises that level four countries be avoided at all costs and a person be fully vaccinated if they do have to go to them.
Less than 20 countries are on the CDC’s lowest warning level at level 1.
In the past few weeks, popular travel destinations for Americans such as Canada and Aruba have moved up to the highest warning due to increased COVID-19 cases.
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Many countries paused travel from several African countries after the omicron variant was discovered to slow the spread of the virus, but the coronavirus still spread rapidly around the world.