Measles cases top 5,400
Measles has reestablished regular transmission in the United States, according to researchers with direct knowledge of deliberations by the Pan American Health Organization, ending a public health triumph secured in 2000.
The U.S. has lost its status as a country where measles is eliminated, NPR reported, following assessments by the Centers for Disease Control and Prevention and an independent group of measles experts. PAHO based its conclusion on analyses showing that sporadic outbreaks failed to end within a year, a threshold required for elimination status.
“It’s a very sad moment,” said Anne Schuchat, an epidemiologist and a former deputy director at the Centers for Disease Control and Prevention who was not involved in PAHO’s decision. “Measles causes so much unnecessary suffering, everything from a high fever and missed work and school to long-term complications like progressive degenerative nerve disease and death.”
Nationwide, infections have climbed to 5,412 cases reported across 45 states, the Centers for Disease Control and Prevention stated. Ten measles-associated deaths have been recorded, including seven in Pennsylvania, two in Wisconsin, and one in New York.
Declining immunization rates create measles vaccination gaps
Public health officials attribute the resurgence to declining immunization rates and mounting vaccination gaps that opened prior to the current administration. Kindergarten vaccination rates for the measles, mumps, and rubella vaccine dropped from 95% in 2019 to 92% in 2026, according to data from ABC News.
Herd immunity typically requires a 95% vaccination rate within a community to stop the virus from spreading. Roughly 300,000 kindergartners entered classrooms without being vaccinated, ABC News reported.
Two doses of the measles-mumps-rubella vaccine prevent about 97% of infections, according to Johns Hopkins University researchers. However, ongoing outbreaks have hospitalized hundreds of people and generated tens of millions of dollars in medical costs and productivity losses.
“Vaccination wasn’t a partisan issue,” said Schuchat, recalling previous surges. “This was about problem-solving: What can we do about this?”
HHS leadership and administration responses to outbreaks
Health and Human Services Secretary Robert F. Kennedy Jr. previously led an anti-vaccine organization before taking the helm at HHS.
Spokespeople for the White House and HHS defended the administration’s actions. “The President and the Secretary have repeatedly encouraged measles vaccination, coordinated with states, and facilitated the deployment of vaccine doses across the country,” White House spokesperson Allison Schuster wrote in an email reported by NPR.
Governor Shapiro's unseemly rush to Lancaster County to convene a national press conference and his giddy delight in announcing two measles deaths was a morose commentary on the contemporary political dialogue. The performance was a replay of the Democrats' COVID playbook:… https://t.co/LvZf3br1dB
The CDC’s flagship journal, the Morbidity and Mortality Weekly Report, has published few updates on recent outbreaks, with agency officials stating that political appointees have delayed or blocked several articles. HHS officials denied suppressing information and said that approximately $100 million in additional funding has been provided to respond to outbreaks.
What criteria define measles elimination and vaccine effectiveness
What criteria does PAHO use to determine measles elimination?
PAHO defines measles elimination as the absence of continuous, endemic transmission of the same viral strain for a period of 12 months within a country. When sporadic imported cases spark outbreaks that continue spreading past one year, elimination status is lost.
How effective is the MMR vaccine against infection?
Two doses of the measles, mumps, and rubella vaccine are about 97% effective at preventing infection, according to Johns Hopkins University researchers. Even when vaccinated individuals contract the virus, they experience significantly lower rates of severe illness and hospitalization.
Which states have recorded measles deaths this year?
State health departments have reported 10 deaths nationwide during the current outbreaks, including seven in Pennsylvania, two in Wisconsin, and one in New York.
Earlier coverage: US Faces Loss of Measles Elimination Status Amid Rising Deaths and Cases