All Americans Traveling Abroad Should Get Measles Vaccine Unless Immune, CDC Says

The agency warns of rising in-transit infection risk as U.S. cases hit their highest level since 2019.

Health department staff members enter the Andrews County Health Department measles clinic, in Andrews, Texas, on April 8, 2025. Annie Rice/AP Photo

The Centers for Disease Control and Prevention has issued a major update to its measles vaccination guidance, urging all Americans traveling internationally to get vaccinated—unless already immune—amid a resurgence of the disease in the United States and abroad.

“All international travelers should be fully vaccinated against measles with the measles-mumps-rubella (MMR) vaccine,” the CDC said in a May 28 update, noting that the recommendation applies to those without adequate evidence of past immunity.