Measles Vaccination Rates Have Fallen Below Herd Immunity
As national measles cases reach a 35-year high, you may be wondering how current vaccination trends impact community health.
Updated on Sept. 28, 2026 in COVID-19
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National measles vaccination rates among kindergarteners have dropped to 92.4% for the 2025-2026 school year, falling beneath the 95% threshold required for herd immunity. This decline occurs as the country faces its highest number of measles cases in 35 years.
Why it matters
Falling below the herd immunity threshold increases the risk of community-wide outbreaks, which has led the current administration to seek new policies regarding childhood immunization schedules. This focus on parental autonomy and potential shifts in vaccine administration is intended to address the rising case counts.
CDC surveillance data indicates that kindergarten vaccination coverage for measles has decreased to 92.4% for the 2025-2026 school year compared to 95.2% in 2019-2020. This rate currently sits below the 95% benchmark required to maintain effective herd immunity across the population.
The players
Mehmet Oz
The Administrator of the Centers for Medicare and Medicaid Services who oversees federal health insurance programs.
Donald Trump
The current President of the United States who signed an executive order regarding vaccine administration.
The details
The MMR vaccine currently provides immunization against measles, mumps, and rubella in a combined series. An executive order recently signed by President Trump proposes the separation of this vaccine into three distinct doses, though the vaccine is not currently available in the U.S. in this format. Decisions regarding the requirements for parental exemptions for these immunizations continue to be managed at the state level.
Timeline
95.2% of kindergarteners were vaccinated during the 2019-2020 school year.
92.4% of kindergarteners were vaccinated during the 2025-2026 school year.
President Trump signed an executive order on vaccines in September 2026.
The CDC released updated national vaccination figures on September 27, 2026.
CMS Administrator Mehmet Oz discussed vaccine safety on September 27, 2026.
Health Landscape
Public health efforts to maintain measles elimination status have historically relied on the 95% herd immunity threshold. The current decline in coverage marks a departure from that standard, potentially complicating long-standing immunization programs.
If you have questions about your child's immunization schedule, it is worth discussing the current guidelines with your pediatrician. Parents should review their state-specific requirements for vaccine exemptions as local regulations define the access and school entry standards.
The takeaway
Maintaining high vaccination coverage is the primary method for preventing measles outbreaks in local communities. Always consult with your physician to verify your family's immunization status and stay informed on any changes to state-level vaccination mandates.
Further reading
For more context on how current vaccination trends are being tracked, see our COVID-19 section.
Source note: This article includes information reported by Hottalkradio.
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