Pennsylvania Reports Fifth Measles Death Amid Worst U.S. Outbreak in Decades

Pennsylvania health officials announced a fifth measles-associated death on Wednesday, marking a grim milestone as the United States grapples with its most severe measles outbreak since 1991.

The latest fatality was an unvaccinated individual from Lancaster County, according to the Pennsylvania Department of Health. The county coroner's office stated it did not handle the death and has not received details from state officials.

Previously, the state reported four other measles-associated deaths: an 18-year-old from Mifflin County, a 40-year-old woman from Jefferson County, and two infants from Lancaster County. The state health department confirmed that none of these individuals were vaccinated; the infants were too young for vaccination.

The current outbreak has led to 943 reported illnesses across 39 Pennsylvania counties, the first measles-associated deaths in the state in 35 years.

Nationally, the U.S. has recorded eight measles-associated deaths in the past two years, exceeding the total for the preceding three decades. The country had eliminated the domestic spread of measles in 2000 due to high vaccination rates, but these rates have declined in recent years, falling below the 95% threshold necessary for herd immunity and increasing susceptibility to outbreaks.

International health officials are scheduled to meet in November to determine if the U.S. and Mexico have lost their measles-free status. Factors contributing to the resurgence include declining routine vaccination rates due to parental waivers, issues with healthcare access, and the spread of misinformation.