Italy

Last year, Italy had more than 5,000 cases, for an incidence of 8 per 100,000 people. Meanwhile, the United States had 118 cases, for an incidence of roughly 0.04 per 100,000 people. The populist politicians and anti-vaxxers are to blame.
Traveling to Italy in the near future? You might want to add "get up to date on your measles vaccines" to your to-do list before jetting away. That's due to a new CDC recommendation, since there's an outbreak currently taking place in Europe's pasta-and-wine paradise.