The CDC issues travel warnings for 15 countries, including several popular Caribbean spots.

As omicron cases continue to rise, the U.S. Centers for Disease Control and Prevention (CDC) has advised Americans against traveling to an additional 15 countries, which feature destinations like Jamaica, St. Barthelemy (St. Barts), St. Martin, and Guadeloupe, commonly visited by cruise travelers and resort-goers.

In its latest update of Level Four: "Very High" risk locations for COVID-19 exposure, the CDC included the following destinations last week:

• Colombia
• Costa Rica
• Dominican Republic
• Fiji
• Guadeloupe
• Jamaica
• Kuwait
• Mongolia
• Niger
• Peru
• Romania
• Saint Barthelemy
• Sint Maarten
• United Arab Emirates

The CDC had previously cautioned against traveling to 22 countries and territories, including the Bahamas and much of the Caribbean, as well as Israel, Australia, Panama, Bolivia, Qatar, and Bermuda. With these new updates, the agency's list of places to avoid now exceeds 100, which includes European nations like the U.K., Italy, and Spain.

The CDC issues its highest Level Four travel advisories when COVID-19 cases surpass 500 per 100,000 people over a 28-day period. A different standard applies to locations with populations under 100,000.

This warning from the CDC suggests that even if you are fully vaccinated against COVID-19, you could still be at risk of contracting and transmitting the virus.

If you decide to travel, the CDC recommends ensuring that you are fully vaccinated and adhering to all guidelines set by airlines and your destination, which may include mask mandates, proof of vaccination, testing, or quarantine requirements.