The U.S. Centers for Disease Control and Prevention (CDC) this week moved Ukraine to its list of “very high” risk travel destinations, citing the spread of COVID-19. Ukraine, the second-largest country in Europe in land area, was moved from Level 3 to Level 4, the highest risk category under the CDC’s guidelines. Earlier this month, the United States bumped up Singapore—a country with one of the highest vaccination rates in the world—to Level 4, and days before that, Belarus was deemed the same. Several other eastern European countries including Romania, Moldova, and Bosnia and Herzegovina were listed as Level 4 around the same time. In its bulletin for Ukraine, the federal health agency repeated several warnings not to travel to Ukraine unless one is fully vaccinated. “If you must travel to Ukraine, make sure you are fully vaccinated before travel,” said the CDC on Oct. 25. “Because of the current …