Measles Outbreak Worsens in the US, Nearing Record Levels

As of early July 2025, the US has reported over 1,274 measles cases, surpassing the total for all of 2019.

The majority of cases are linked to a large outbreak originating in west Texas, but smaller outbreaks and travel-related cases are also contributing to the surge.

The Pan American Health Organization (PAHO) reports a 29-fold increase in measles cases in the Americas compared to the same period in 2024, with significant outbreaks in Canada and Mexico as well.

Wyoming has confirmed its first measles case since 2010, highlighting the widespread nature of the outbreak.

*Why this matters:* Measles is highly contagious, and complications can be severe, especially for young children and those with weakened immune systems. This resurgence threatens to undo decades of progress in eliminating the disease.

Get vaccinated: Ensure that you and your family members are up-to-date on MMR (measles, mumps, and rubella) vaccinations. Two doses of the MMR vaccine are about 97% effective in preventing measles.

Know the symptoms: Be aware of measles symptoms, which include high fever, cough, runny nose, watery eyes, and a rash that appears three to five days after the first symptoms.

Practice good hygiene: Wash your hands frequently and avoid close contact with people who are sick.

Stay informed: Follow updates from the CDC and your local health department.

Unvaccinated individuals.

Infants too young to be vaccinated.

People with weakened immune systems.

Travelers to areas with measles outbreaks.

Q: How contagious is measles?

A: Measles is one of the most contagious infectious diseases. Approximately 90% of unvaccinated people who are exposed will contract the disease.

Q: What are the complications of measles?

A: Complications can include pneumonia, encephalitis (brain swelling), and even death.

Q: Where are measles cases concentrated?

A: Most of the cases have been reported in Texas, New Mexico and Kansas, according to the Center for Outbreak Response Innovation and the CDC .

Measles is making a comeback in the US due to declining vaccination rates and international spread.

Vaccination is the best way to protect yourself and your community from measles.

Be aware of the symptoms of measles and seek medical attention if you suspect you may have been exposed.

This outbreak affects everyone, but especially unvaccinated individuals, infants, and those with weakened immune systems.