Measles in the United States: 2,903 confirmed cases in 2026, 92.4% coverage at school entry

The count is a surveillance figure, not a research one: the U.S. Centers for Disease Control and Prevention recorded 2,903 confirmed measles cases during 2026 as of August 27, with the data page updated as of August 30. It is the most recent verifiable figure at the time of publication. The limitation inherent to this type of data applies: totals are updated periodically as state jurisdictions transmit laboratory confirmations, and published figures may be revised in either direction relative to what is reported here.

Alongside the cases, the CDC publishes the second indicator needed to interpret them: the share of children vaccinated upon entering the school system. Measles-mumps-rubella vaccine coverage among children enrolled in kindergarten fell from 95.2% in the 2019-2020 school year to 92.4% in 2025-2026. According to the CDC, the difference corresponds to roughly 280,000 unprotected children in a single school cohort. On effectiveness, the federal agency states that two doses prevent measles in 97% of cases; the figure is reported here as the agency’s position, not as a measure derived from the 2026 numbers.

The outbreak picture is the third element. The Public Health Communications Collaborative counts 32 new outbreaks reported in 2026, following 48 in 2025. The decrease compared with the previous year is arithmetic, but the comparison must be handled with caution: the two figures cover different observation periods — one closed year and one still under way — and are not directly comparable until 2026 has concluded.

2025 remains the benchmark. Analysis by KFF finds that in that year the United States recorded more cases, more outbreaks, more states affected and more measles deaths than in any other year since 1992. KFF is a research organization independent of the federal administration, and its reconstruction provides external corroboration of the public agency’s data.

The discussion also has an explicit political dimension. According to PBS NewsHour, on September 2, 2026 officials in the Trump administration questioned the role of measles in two deaths, reopening public debate over public health policy. Redazione Zero reports the circumstance as a position expressed by officeholders in the exercise of their role: the available record does not contain health authorities’ determinations on the two cases, and no clinical conclusion is attributed here to either side. No element referring to identifiable individuals is included in this piece.

A methodological point remains for outside readers of the numbers. Cases, outbreaks and vaccination coverage are three distinct series, collected with different criteria and timelines: coverage is an annual school-based snapshot, cases are a continuous flow, outbreaks are a count of events defined by individual jurisdictions. Placing them on the same chart does not produce a causal relationship: the CDC publishes them alongside one another, not one as an explanation of the others.

The verifiable figure on which this closes is the one declared by the federal agency: 92.4% coverage at kindergarten entry in the 2025-2026 school year, against 95.2% six years earlier, and 2,903 confirmed cases as of August 27, 2026.

Sources: Centers for Disease Control and Prevention (U.S. federal health agency); Public Health Communications Collaborative; KFF; PBS NewsHour.