Measles Cases Projected to Surge With Slight Vaccination Drop

Even a 1% annual decline in MMR vaccine coverage could lead to over 17,000 new measles cases and $1.5 billion in added healthcare costs, report warns.

Published on Mar. 9, 2026

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A new report from the Common Health Coalition projects that even a 1% annual drop in the rate of MMR (measles/mumps/rubella) childhood vaccinations could spark a seven-fold increase in new measles cases, leading to 17,000 additional cases, 4,000 more hospitalizations, and 36 preventable deaths each year. The report also estimates this 1% vaccination decline would cost the U.S. an extra $1.5 billion annually in related healthcare expenses through 2030.

Why it matters

Maintaining high vaccination rates is crucial to preventing the spread of highly contagious diseases like measles. Recent major outbreaks in several states have highlighted the importance of vaccination, as measles can spread rapidly among unvaccinated populations. This report underscores how even small declines in vaccination coverage can have outsized consequences in terms of public health and economic costs.

The details

The report, authored by researchers at the Yale School of Public Health, assessed county-level MMR vaccination coverage and projected the impact of a hypothetical 1% annual decline in coverage from now until 2030. They found this scenario would place national coverage at around 87.5%, 7.5 percentage points below the 95% threshold widely recognized as necessary to sustain herd immunity for measles due to its high transmissibility. As a result, the researchers estimate there would be over 17,000 measles cases annually, a more than 15,000 case increase, along with 4,000 additional hospitalizations.

  • So far in 2026 there have been 1,281 reported cases of measles and 12 new outbreaks affecting 31 states.
  • Last week federal officials reported a measles outbreak at the nation's largest ICE detention facility in El Paso, Texas, with at least 14 cases confirmed.

The players

Common Health Coalition

A coalition focused on public health issues that commissioned the report on the potential impacts of declining measles vaccination rates.

Dr. Dave Chokshi

Chair of the Common Health Coalition and a proponent of maintaining high vaccination rates to protect public health.

Alison Galvani

Director of the Center for Infectious Disease Modeling and Analysis at the Yale School of Public Health, which conducted the research for the report.

U.S. Centers for Disease Control and Prevention (CDC)

The federal agency that tracks and reports on measles cases and outbreaks in the United States.

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What they’re saying

“Vaccination is one of the most powerful investments we can make for the health of our children, but when we fail to maintain high vaccination rates, we all pay the price.”

— Dr. Dave Chokshi, Chair, Common Health Coalition (Common Health Coalition)

“A 5% reduction in MMR vaccine coverage over the next five years is highly plausible given current trends, as vaccine coverage has already fallen by roughly 2.5-3 percentage points since 2020 prior to recent policy changes.”

— Alison Galvani, Director, Center for Infectious Disease Modeling and Analysis, Yale School of Public Health (Common Health Coalition)

“Our analysis shows that highly contagious diseases like measles exploit even small gaps in immunity, leading to cascading infections and compounding costs for health systems, communities, and families.”

— Alison Galvani, Director, Center for Infectious Disease Modeling and Analysis, Yale School of Public Health (Common Health Coalition)

What’s next

The report recommends several actions to help boost vaccination rates, including ensuring insurers continue to fully cover vaccinations, maintaining or strengthening school-entry immunization requirements, building public confidence in vaccines through messaging, and improving vaccine access through regional coalitions.

The takeaway

This report underscores how even small declines in measles vaccination coverage can have significant public health and economic consequences. Maintaining high vaccination rates is crucial to preventing the spread of highly contagious diseases and avoiding the human suffering and financial burdens associated with preventable outbreaks.