The short version
- Pennsylvania officials confirmed two measles deaths in unvaccinated individuals, the first such fatalities in the state since 1991 and the first in the nation this year.
- National measles cases have reached 2,777 so far in 2026, driven by vaccination rates slipping below the 95 percent threshold required for community protection.
- Federal vaccine policy changes and executive orders promoting split dosing have drawn sharp criticism from state leaders who cite rising misinformation and real-world health consequences.
Health authorities in Pennsylvania confirmed on Tuesday that two unvaccinated residents of Lancaster County have died from measles, marking the first fatalities from the disease in the state in thirty-five years. These deaths represent the first recorded measles-related deaths in the United States for 2026, following a period of relative stability since the country declared the virus eliminated in 2000. The victims’ identities and ages remain protected under privacy laws, though officials emphasized that both individuals lacked immunization against the highly contagious pathogen.
The fatalities occur within a broader outbreak that has seen 393 confirmed cases across twenty-eight Pennsylvania counties this year. Nationally, the Centers for Disease Control and Prevention reports at least 2,777 cases so far in 2026, the highest total since 1991. This surge follows a previous spike last year, which included three deaths: two unvaccinated school-age children in Texas and one unvaccinated adult in New Mexico. Before those incidents, the US had not recorded a measles death since 2015, when an adult with underlying health conditions succumbed to the illness.
Public health experts attribute the resurgence largely to declining vaccination coverage. The national immunization rate for children has dropped to approximately 92 percent, falling short of the 95 percent benchmark necessary to maintain herd immunity and prevent widespread transmission. In Pennsylvania, kindergarten vaccination rates have declined from 96.7 percent in 2017 to 92.7 percent in 2026. The situation is particularly acute in Lancaster County, where only 87.6 percent of kindergartners were fully vaccinated against measles during the last school year, leaving significant pockets of vulnerability within the community.
The MMR vaccine, which protects against measles, mumps, and rubella, is considered safe and highly effective, with two doses providing 97 percent protection. Despite this evidence, confidence in immunization has eroded due to persistent misinformation and anti-vaccine rhetoric. Federal leadership has played a notable role in this shift; Health Secretary Robert F. Kennedy Jr., a known vaccine skeptic, has pursued policies to alter childhood vaccination schedules. Although a federal judge blocked many of these changes earlier this year, the administration’s messaging continues to influence public perception.
Tensions between state and federal authorities have intensified recently. President Donald Trump signed an executive order earlier this month calling for fewer childhood vaccinations and recommending that the MMR vaccine be split into three separate shots. Public health officials warn that such measures could create confusion about the safety and efficacy of the combined vaccine, potentially leading to lower uptake rates. The president has also made false claims regarding the lethality of the MMR vaccine, contradicting decades of data showing no link between the vaccine and death in individuals with competent immune systems.
Pennsylvania Governor Josh Shapiro addressed the crisis directly, speaking with Health Secretary Kennedy earlier on Tuesday. Shapiro stated he was blunt about the negative impact of federal rhetoric on local communities, emphasizing that misinformation has real-life consequences. The governor noted that while Kennedy offered CDC staff support, the administration’s actions were undermining public trust in essential health measures. Shapiro reiterated that measles is a preventable disease and stressed the importance of maintaining high vaccination rates to protect vulnerable populations, including those who cannot be vaccinated for medical reasons.
The clinical risks of measles extend beyond immediate mortality. While fatality rates are relatively low, ranging from one to three per thousand cases, the virus can cause severe complications such as pneumonia, encephalitis, and permanent hearing loss or intellectual disabilities. A rare but fatal neurological condition known as subacute sclerosing panencephalitis (SSPE) can develop years after initial infection, typically affecting children who appeared to have recovered. These long-term dangers underscore the severity of the disease, which many Americans have not encountered in decades and may therefore underestimate.
The US is currently at risk of losing its measles-elimination status, a designation determined by an international panel in November. Canada lost this status last year due to similar outbreaks and vaccination gaps. As non-medical exemption rates hit record highs, reaching 4 percent nationally, the window for reversing the trend narrows. Health officials are urging residents to verify their immunization records and seek vaccination if needed, aiming to restore community protection before the virus gains further foothold in under-immunized areas.
Looking ahead, the focus remains on halting transmission through increased vaccination coverage and countering misinformation. State health departments are working to identify at-risk communities and provide education on the safety of the MMR vaccine. The coming months will be critical in determining whether the US can stabilize its immunization rates and prevent further fatalities. Without significant intervention, the current trajectory suggests continued outbreaks and potential loss of elimination status, reversing decades of public health progress.
Sources behind this briefing
Go to the original reporting
- Ars Technica↗Two unvaccinated people die from measles in Pennsylvania, officials confirm
- BBC World↗Two unvaccinated people die of measles in Pennsylvania
