Measles Outbreak in Canada and USA Each Exceed 1,000 Cases

With several countries in the Northern Hemisphere setting new records for measles cases, the United States is unfortunately keeping pace.

In a weekly update, the U.S. Centers for Disease Control and Prevention (CDC) reported an additional 66 measles cases, bringing the national total to 1,001 this year.

As of May 8, 2025, 31 jurisdictions, led by the state of Texas, reported 1,001 confirmed measles cases.

The United States is on track to exceed the 1,279 cases reported in 2019, when an unvaccinated religious group led to cases in several cities, including New York.

To notify international travelers of this health risk, the CDC reissued a Travel Health Advisory in March 2025, identifying 57 countries reporting measles cases.

As of May 11, 2025, the CDC has not included Texas, Ontario, Canada, or Mexico (700+) in its measles advisory.

The CDC writes, 'All international travelers should be fully vaccinated against measles with the measles-mumps-rubella vaccine, including an early dose for infants.'