The United States has confirmed two measles-related deaths this year, as the number of confirmed cases has surged to 3,659, marking the highest total in 35 years. The Centers for Disease Control and Prevention (CDC) announced the figures without specifying the states where the fatalities occurred.

Measles, a highly contagious but preventable disease, was declared eliminated in the U.S. in 2000. However, it has seen a significant resurgence in recent years, a trend some public health officials and experts link to increasing vaccine hesitancy.

The national tally has been complicated by reporting discrepancies, notably a public dispute between Pennsylvania Governor Josh Shapiro and Health and Human Services Secretary Robert F. Kennedy Jr. Pennsylvania had reported four measles-related deaths, but the CDC initially did not include all of them in its national count, with Kennedy maintaining only one was directly caused by measles.

The CDC recently shifted its methodology for tracking national measles deaths, moving from real-time state health department reports to mortality data from the National Center for Health Statistics (NCHS). This change has drawn criticism, and the agency states it is working with state epidemiologists to establish a standardized definition for measles-related deaths to ensure consistent reporting across jurisdictions. The reported death toll remains subject to revision as further information and reviews become available.

This year's outbreak has been particularly severe in Pennsylvania, which has reported over 900 cases, making it the hardest-hit state. The situation highlights broader concerns about declining vaccination rates, which experts warn create vulnerabilities for the re-emergence of diseases that were once largely controlled.

Further complicating public health efforts, a recent executive order signed by President Donald Trump in August aims to encourage states to modify childhood vaccine recommendations. The order proposes splitting the measles, mumps, and rubella (MMR) vaccine into separate shots and altering appointment schedules, a move that public health experts caution could increase infection risks by necessitating additional visits.

The CDC has experienced significant operational challenges, including substantial staff losses following federal employee layoffs after the president's January 2025 inauguration and subsequent retirements and resignations. These internal pressures may affect the agency's capacity to manage and respond effectively to public health crises.

Public health experts continue to emphasize that combination vaccines, like the MMR, have decades of global evidence supporting their safety and efficacy. The current surge in measles cases underscores the critical importance of maintaining high vaccination coverage to prevent outbreaks of preventable diseases.