U.S. Measles Cases Reach Highest Levels Since 2019: What You Should Know
More than 900 measles cases have been reported in 2025, with outbreaks concentrated in Texas and spreading across 29 states. Here’s what’s driving the surge—and how to stay protected.
Key Takeaways
- As of early May 2025, at least 935 measles cases have been confirmed across the U.S.
- Texas is the epicenter, with over 680 cases, especially in West Texas communities.
- The vast majority of cases—about 96–97%—involve unvaccinated individuals or individuals with unknown vaccination status.
- Measles is highly contagious and can lead to severe complications, especially in children.
- Three deaths have been reported: two children in Texas and one adult in New Mexico.
Where the Outbreak Stands Now
According to data compiled by state health departments and the CDC, the current measles outbreak is the largest in the U.S. since 2019. The hardest-hit area is West Texas, particularly Gaines County, where over 60% of Texas cases originated.
From there, the virus has spread:
- New Mexico: at least 66 confirmed cases
- Oklahoma: at least 15 cases
- Other states, including Illinois, Kansas, and California, have also reported cases, many of which are connected to the Texas outbreak or to international travel.
Why Measles Is Surging
Experts point to a combination of factors behind the rise:
- Declining vaccination rates: The national MMR (measles, mumps, rubella) vaccination rate has dropped below the 95% threshold needed for herd immunity.
- Localized resistance or distrust: Approximately 83% of current cases are tied to close-knit communities with lower vaccination coverage.
- Increased travel: Some sporadic cases are linked to international exposure or contact with outbreak zones.
“The data are clear—unvaccinated children and adults remain at the highest risk,” says public health expert Dr. Lisa Hernandez. “And when vaccination rates dip, measles finds a way back in.”
Who’s Most at Risk?
- Children and teens make up most of the current cases.
- The median age of those infected is just 9 years old.
- Measles is especially dangerous for young children, pregnant individuals, and those with weakened immune systems.
Symptoms typically begin 7–14 days after exposure and include:
- High fever
- Cough
- Runny nose
- Red, watery eyes
- Rash that usually starts on the face and spreads
Complications can include pneumonia, encephalitis (brain swelling), and in rare cases, death.
How to Protect Yourself and Your Community
✅ Get vaccinated: The MMR vaccine is safe and highly effective. Two doses provide about 97% protection against measles.
✅ Know your status: If you’re unsure whether you’ve been vaccinated or if your children are up-to-date, talk to your healthcare provider.
✅ Follow local health guidance: In outbreak areas, authorities may recommend temporary quarantine, isolation, or expedited vaccination clinics.
✅ Combat misinformation: Talk to trusted healthcare professionals about vaccine concerns. Share accurate resources within your community.
The Bottom Line
Measles is not a disease of the past. The 2025 outbreak shows how quickly it can return when vaccination rates decline. While most Americans are protected, gaps in coverage—especially in specific communities—put everyone at risk.
Public health officials continue to call for stronger vaccination campaigns, culturally competent outreach, and increased vigilance.
“Almost all measles cases in the United States are among people who were not vaccinated or whose vaccination status is unknown,” according to the Centers for Disease Control and Prevention (CDC). The agency warns that measles is one of the most contagious diseases in the world and can cause severe health complications, especially in young children and immunocompromised individuals.
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