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(CNN) – France and Iceland are among the seven destinations added on Monday to the most dangerous travel category by the US Centers for Disease Control and Prevention (CDC).

Travel to places with a “Level 4: Covid-19 very high” warning should be avoided, according to the CDC Guidebook. The agency warns that anyone who has to travel should be fully vaccinated first.

The seven destinations added to the Tier 4 list on August 9 are:

• Aruba
• Eswatini (formerly Swaziland)
• France
• French Polynesia
• Iceland
• Israel
• Thailand

In its broader travel guide, the CDC recommends against international travel until you have been fully vaccinated.

“Fully vaccinated travelers are less likely to contract and spread the COVID-19 virus. However, international travel presents additional risks, and even fully vaccinated travelers may be at greater risk of infection and possibly spreading some types of COVID-19,” the agency said.

Destinations that fall into the “very high” risk category have had more than 500 cases per 100,000 residents in the past 28 days, according to the CDC’s criteria.

The CDC maintains an evolving list of travel advisories from Level 1 (“low”) to Level 4 (“very high”). last week , The agency added 16 destinations to the “very high” risk category.Including Greece, Ireland and the US Virgin Islands.

You can see the CDC risk level for any destination on their page Travel recommendations.

Latin American countries included in ‘Level 4: Covid-19 is very high’

• Argentina
• Brazil
• Chile
• Colombia
• Costa Rica
• Cuba
• Nicaragua
• Panama
• Paraguay
• Suriname
• Uruguay