U.S. Measles Cases Hit 35-Year High — and the Situation Has Worsened Since July

A social-media graphic featuring a child with a measles-like rash claimed that the United States had reached its highest number of cases of the “world’s most contagious disease” in 35 years — and that it was happening while the year was only halfway over.

The underlying claim was accurate when the graphic was circulating in July 2026. But the latest numbers show that the outbreak has continued to grow substantially since then.

As of Sept. 4, 2026, the CDC had recorded 3,134 confirmed measles cases in the United States, the highest annual total in more than 35 years.

Measles has now passed 3,100 cases

The July graphic appears to refer to the point when the United States crossed its previous 35-year benchmark.

On July 24, Reuters reported 2,318 confirmed cases, already surpassing the 2,289 cases recorded during all of 2025.

By Sept. 4, the CDC's figure had reached 3,134.

Of those cases:

• 3,118 were reported across 47 U.S. jurisdictions.
• 16 were among international visitors.
• 248 people had been hospitalized, about 8% of confirmed cases.
• About 94% of cases involved people who were unvaccinated or whose vaccination status was unknown.
• The CDC had recorded 38 new outbreaks in 2026.

The numbers are preliminary and can change as health departments report additional cases.

Why the “35 years” comparison matters

Measles was declared eliminated from the United States in 2000, meaning there had been no continuous transmission for at least 12 months.

That did not mean measles disappeared permanently. Imported infections can still enter the country, but high vaccination coverage historically prevented them from spreading widely.

The current resurgence is different.

CDC data show kindergarten MMR vaccination coverage has fallen from 95.2% in the 2019–2020 school year to 92.4% in 2025–2026. The CDC says communities generally need vaccination coverage above 95% to maintain strong community protection against measles.

Measles is extraordinarily contagious

The graphic's description of measles as one of the world's most contagious diseases is supported by public-health authorities.

The CDC describes measles as one of the most contagious human diseases. The virus spreads through the air and can remain infectious in an area after an infected person has left.

Symptoms commonly include fever, cough, runny nose, red or watery eyes and a characteristic rash. Complications can include pneumonia, brain swelling and, in severe cases, death.

Two doses of the MMR vaccine provide the best protection.

The outbreak is not confined to one state

The resurgence has involved multiple parts of the country.

South Carolina has experienced one of the country's largest outbreaks, with hundreds of cases concentrated in areas with low vaccination coverage. Reuters reported in March that the state's outbreak had become the largest U.S. measles outbreak since 1992.

The national outbreak follows a particularly bad 2025, when the United States recorded 2,289 confirmed cases and three deaths, according to current CDC data.

That means the country has now gone from a serious resurgence in 2025 to an even larger outbreak in 2026.

The death count is currently disputed

There is also a developing controversy over measles-associated deaths in Pennsylvania.

Pennsylvania health officials reported two deaths associated with measles in August. The CDC subsequently removed them from its national tally while it reviews whether measles caused or contributed to the deaths. Reuters reported that Health Secretary Robert F. Kennedy Jr. had asked CDC Director Erica Schwartz to remove references to the deaths from the agency's online tally.

As of Sept. 4, the CDC therefore was not counting those Pennsylvania deaths as confirmed measles deaths.

A separate report on Sept. 5 said Kennedy acknowledged that one Pennsylvania infant's death was due to measles based on the county coroner's findings, while the CDC was continuing its review.

That makes the death statistics considerably more complicated than the case-count statistics.

What the viral graphic gets right — and what it leaves out

What it gets right: The United States really has reached a 35-year high for measles cases. The July timing was also significant: the country had already exceeded the previous annual high before the year was even halfway finished.

What has changed: The graphic is now outdated. The total has climbed from roughly 2,300 cases in July to 3,134 as of Sept. 4.

What it doesn't explain: The increase is occurring alongside declining childhood MMR vaccination coverage, and the overwhelming majority of reported 2026 cases involve people who were unvaccinated or whose vaccination status was unknown.

And importantly: The photograph itself is illustrative. It should not be treated as evidence that the particular child pictured has measles or is connected to the current U.S. outbreak.