Two tropical islands half a world apart and popular with tourists -- Jamaica in the Caribbean and Sri Lanka in South Asia -- are now among the highest-risk destinations for travelers.

That's according to the US Centers for Disease Control and Prevention's travel advisories list, which was updated on Tuesday.

Top image: A man crossing a deserted street during a nationwide lockdown imposed to curb the spread of Covid-19 coronavirus in Sri Lanka's capital, Colombo, on August 21. Photo by Ishara S. Kodikara. CNN's Kristen Rogers and Marnie Hunter contributed to this report.

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