In brief
U.S. measles cases have surpassed 5,000, the highest annual total since 1991. Almost 60 % of infections affect children and teenagers, while vaccination coverage among kindergarteners has slipped below 93 %. A dispute over how measles deaths are counted has emerged, particularly in Pennsylvania, where state officials report higher death totals than the federal agency.
A tally from the Centers for Disease Control and Prevention (CDC) shows that 5,182 Americans have tested positive for measles in 2026, a figure that marks the highest yearly total recorded by the agency in 35 years.
Al Jazeera reports that the surge comes after a rise in unvaccinated children, with children under five making up 18 % of cases and those aged five to 19 accounting for 41 %. The outlet notes that 4,993 of the illnesses are linked to a single outbreak cluster.
Reuters reports a similar count of 5,182 cases, describing the figure as the largest annual total ever documented by the CDC. The agency’s statement, according to Reuters, presents the data in the context of a 2025 benchmark of 2,289 confirmed cases, more than doubling the prior year’s tally.
Bloomberg cites the CDC’s figures and adds that the U.S. kindergarten vaccination rate fell from 95.2 % during the 2019‑2020 school year to 92.4 % in 2025‑2026, underscoring a decline in routine measles immunization coverage.
Dispute Over Death Toll
According to the CDC, four deaths have been attributed to measles in 2026. However, state officials, particularly in Pennsylvania, list higher numbers. Pennsylvania’s Department of Health reported six deaths and 1,487 cases this year, citing a “measles‑associated” classification that tracks any death occurring within 30 days of symptom onset unless unrelated.
The Pennsylvania report sparked a public disagreement between Governor Josh Shapiro and U.S. Health Secretary Robert F. Kennedy Jr. Shapiro argues that the death count should include all individuals who died after a confirmed measles diagnosis, while Kennedy, a vaccine skeptic, questions the federal agency’s practice of removing some of those deaths from the national tally.
Both the state and federal figures remain in tension as the CDC has not yet clarified its methodology for reconciling the divergent death counts. The disagreement highlights broader disputes over surveillance criteria.
Regarding age distribution, Al Jazeera emphasizes that children and teenagers account for roughly 59 % of all confirmed cases, with the majority of the outbreak being outbreak‑associated rather than sporadic. The CDC’s data supports similar breakdowns, indicating a concerning shift in the disease’s demographic reach.
The monitoring of measles cases continues as public health officials and policymakers debate testing strategies and vaccination mandates. Current updates suggest the CDC will release more detailed case reports in the coming weeks as the end of the calendar year approaches.
