US vaccination rates fall again as exemptions continue to rise, CDC data shows

New CDC data reveals childhood vaccination rates in the United States have dropped yet again, while the number of families claiming exemptions continues to climb. Notably, health officials released the figures without issuing a formal report, simply posting raw data publicly — a departure from standard practice.

Childhood immunization rates in the United States have declined for another consecutive period, according to newly released CDC data, with exemption rates simultaneously trending upward. The findings raise fresh public health concerns about the erosion of herd immunity for preventable diseases like measles and whooping cough. What drew additional scrutiny was the manner in which the CDC disclosed the information — bypassing its traditional formal report format and instead quietly publishing the raw numbers online. This shift in communication practice has prompted questions about transparency and whether the agency is stepping back from its role in contextualizing public health data. Rising exemptions, whether medical, religious, or philosophical, have been a growing trend in recent years, and experts warn that continued declines in coverage could set the stage for larger disease outbreaks.

For the second consecutive reporting period, federal health data shows that vaccination coverage among American children has slipped, while the share of families opting out through exemptions has grown. The Centers for Disease Control and Prevention released these figures not through its customary formal report — complete with analysis, context, and public health guidance — but by simply uploading raw data to its website, a move that itself became a story within the story. Public health experts and journalists noted the understated release as a potential signal of shifting priorities or reduced resources within the agency during a period of broader federal health policy turbulence. The data itself carries serious implications. Vaccination rates need to remain high — typically above 95% for diseases like measles — to maintain herd immunity and protect those who cannot be vaccinated for genuine medical reasons, such as infants and immunocompromised individuals. When coverage dips even slightly below those thresholds, communities become vulnerable to outbreaks of diseases that were once considered effectively controlled in the U.S. The rise in exemptions spans multiple categories, including religious and philosophical opt-outs, which are permitted in many states and have become increasingly normalized in some communities. Misinformation about vaccine safety, amplified through social media and, in some cases, by public figures, has contributed to growing hesitancy. Why it matters: The combination of falling vaccination rates and a federal health agency pulling back from proactive public communication is a compounding problem. Without clear, accessible guidance from the CDC, parents navigating conflicting information online have fewer authoritative resources to turn to. At the same time, local and state health departments — already strained — may face growing pressure to fill the communication gap. If these trends continue unchecked, the United States could face resurgences of preventable diseases at a scale not seen in decades, with the most vulnerable populations bearing the heaviest burden.