CDC moves Germany and Denmark to ‘do not travel’ list The Centers for Disease Control and Prevention has moved Denmark and Germany to its highest-risk category for travel as Europe continues to grapple with rising numbers of infections and deaths, leading some countries to reintroduce lockdowns and other restrictions they not long ago considered things of the past. The countries were given a Level 4 warning, which means the CDC is recommending that Americans avoid traveling there, even if vaccinated. They join other European destinations on the Level 4 list, including some that were added recently — Hungary, Iceland, the Czech Republic and Guernsey last week — and others that have been on the list for months, such as Britain. [CDC puts more European destinations on its Level 4 travel list] Countries and territories in this group have an infection incidence rate of more than 500 new cases per 100,000 people over the past 28 days (or, in places with fewer than 100,000 residents, more than 500 cases cumulatively over the past 28 days).