US Vaccination Rates Fall as Exemptions Rise, CDC Data Shows

Kindergarten vaccination rates in the United States hit a new low during the 2025–2026 school year, continuing a multi-year decline that threatens community immunity nationwide. Newly released federal health data reveals that inoculation coverage for incoming students is slipping further below the critical thresholds required to prevent widespread outbreaks of highly contagious diseases. This downward trend coincides with a sharp rise in families opting out of school immunization mandates, signaling a growing public health crisis.

National coverage for the measles, mumps, and rubella (MMR) vaccine dropped to 92.4 percent, down from 92.5 percent the previous year. Similarly, immunization rates for the diphtheria, tetanus, and pertussis (DTaP) vaccine fell to 92.0 percent. More than half of all states recorded declines across multiple essential immunizations, including polio and chickenpox. Currently, only ten states—including California, New York, West Virginia, and Massachusetts—maintain the safety benchmark for MMR coverage, leaving the vast majority of the country vulnerable.

The steady erosion of childhood vaccination rates began immediately after the 2019–2020 school year, when national coverage hovered at the ideal 95 percent mark. Public health standards identify this 95 percent threshold as the necessary shield to achieve herd immunity and protect vulnerable populations who cannot receive shots. Moving further away from this target compromises the collective safety net that has kept devastating pediatric illnesses at bay for decades, reversing years of progress in preventative medicine.

While structural barriers and healthcare access issues prevent some children from getting timely shots, intentional exemptions are driving the current decline. Nonmedical exemptions based on religious or personal beliefs jumped significantly to 4 percent, up from 3.2 percent the prior year. Meanwhile, legitimate medical exemptions remain flat at a mere 0.2 percent. This shift indicates that the primary obstacle to achieving optimal coverage is no longer healthcare access, but rather deliberate parental decisions to bypass school immunization requirements.

The surge in exemptions carries severe real-world consequences, as 24 states now report exemption rates exceeding 5 percent—nearly doubling the count of 14 states from just two years ago. When local exemptions surpass this mark, reaching the safety threshold becomes mathematically impossible. Consequently, vaccine-preventable diseases are surging nationwide, and a 34-year high in measles cases now puts the nation on the verge of losing its official measles elimination status.

Looking ahead, the battle over public health policy is intensifying as federal leadership shifts toward skepticism of traditional medicine. The quiet online release of this critical data, stripped of the comprehensive analysis historically provided in official peer-reviewed medical journals, signals a major shift in how health information is communicated to the public. As national leaders continue to question vaccine efficacy, the future of childhood immunization programs faces unprecedented political headwinds that could reshape public health for a generation.

Originally reported by Ars Technica