US measles cases reach 4,410 in 2026, CDC figures show, per reports

The United States recorded 4,410 measles cases in 2026 as of 15 October, according to figures from the Centers for Disease Control and Prevention (CDC) reported by Al Jazeera and Reuters. That is 330 more cases than the agency's previous update a week earlier.

The CDC figures also show 451 measles-related hospitalisations nationwide this year, according to Al Jazeera. People aged 5 to 19 account for 42 percent of cases. Adults aged 20 and older account for 41 percent. Children under 5 account for 17 percent.

Pennsylvania outbreak

According to Al Jazeera, Pennsylvania has the largest outbreak in the US. It began in late April. The state health department reported 1,222 cases across 42 counties as of Wednesday. That includes 86 new infections since 9 October.

According to Al Jazeera, the outbreak has led to 225 hospitalisations and five confirmed measles-associated deaths. State officials are investigating a sixth reported death.

Pennsylvania requested federal assistance, known as an Epi-Aid. Al Jazeera reports that the CDC is sending an investigator from its Epidemic Intelligence Service in response. State health centre staff have given more than 5,900 doses of the MMR vaccine at 202 pop-up clinics since the outbreak began, according to Al Jazeera.

New York emergency order

According to Al Jazeera, New York Governor Kathy Hochul declared a statewide disaster emergency on 5 October. The order runs until 4 November. It increases the number of healthcare professionals authorised to give vaccines. It also gives nurses more flexibility to order measles testing.

Vaccination coverage

CDC data show that measles vaccination coverage among US kindergarteners fell from 95.2 percent in the 2019–2020 school year to 92.4 percent in 2025–2026, according to Al Jazeera. The CDC estimates that about 280,000 kindergarteners are at risk because of gaps in coverage.

What the reports do not include

The reports reviewed by Vocemundi do not give the total number of measles deaths in the US in 2026. They do not describe the outcome of the inquiry into the sixth reported death in Pennsylvania. They do not describe the vaccination status of the people infected, nationally or in Pennsylvania. They do not say how the Pennsylvania outbreak started or which communities are most affected. They do not give case numbers for New York or describe outbreaks in other states. They do not say when the CDC investigator will arrive or how long the deployment will last. The Reuters report reviewed by Vocemundi is a summary without further detail.

No official CDC or state statement is quoted directly in the reports.

Analysis

The reported figures point to a continued rise in cases, with 330 added in one week. The federal deployment to Pennsylvania and New York's emergency order show authorities at different levels responding, though the reports do not detail coordination between them. The decline in kindergarten vaccination coverage is documented, but the reports do not link it directly to these outbreaks, and the vaccination status of those infected is not described. Key unknowns include the outbreak's origin, the outcome of the sixth death inquiry and the findings of the CDC investigation. Future CDC updates may clarify whether case growth is slowing or accelerating.

Produced by the Vocemundi newsroom with AI assistance.