(AP Photo/Annie Rice, File)

U.S. health officials have changed their advice to international travelers about measles, saying that Americans should be vaccinated against the virus no matter where they're going.

U.S. residents are recommended to get measles-mumps-rubella shots, anyway. But the CDC previously emphasized the importance of vaccination for travelers going to countries with outbreaks.

Last week, the CDC updated its guidance to call for vaccinations for travelers going to all other countries.

Ashley Darcy-Mahoney, PhD, NNP, a researcher at George Washington University's nursing school, called the update significant.

A Colorado outbreak last month stemmed from an international flight that landed in Denver, she noted. The CDC travel notice change reflects a recognition that

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