For the 2024–25 school year, the United States has recorded its highest percentage of kindergartners with vaccine exemptions—4.1%, or roughly 138,000 children. This new data from the Centers for Disease Control and Prevention (CDC) follows a worrying trend that’s gained momentum since the COVID-19 pandemic disrupted routine immunizations. With measles outbreaks on the rise and herd immunity slipping, pediatricians and public health experts are asking a pressing question: what happens when vaccine complacency meets misinformation?According to the CDC’s most recent report, vaccine exemptions for kindergartners have jumped more than a full percentage point over the last four years. Nearly all of these exemptions are classified as nonmedical, which means they’re granted for religious or personal reasons—not for health-related concerns.Exemptions increased in 36 states this school year, and in 17 states, more than 5% of kindergartners have opted out of one or more required vaccinations. That’s a critical problem for public health officials, as it creates fertile ground for vaccine-preventable diseases to return.Measles—a disease that was declared eliminated in the U.S. in 2000—is making a grim comeback. So far in 2025, there have been 1,333 measles cases in 39 states, the highest number recorded in more than three decades. CDC officials note that most of these cases are among unvaccinated children.Why does this matter? Because measles is one of the most contagious viruses on the planet. To prevent outbreaks, at least 95% of a community needs to be vaccinated. In the U.S., however, MMR (measles-mumps-rubella) vaccine coverage has dropped to 92.5%—the fifth year in a row it’s fallen below the federal target.The effects of declining trust in vaccines, what concerns me most is that we’re playing with fire, and children will get burned.While several variables contribute to vaccine hesitancy, some experts point to political shifts at the federal level. Dr. Besser specifically criticized Health and Human Services Secretary Robert F. Kennedy Jr., a long-time vaccine skeptic, for what he believes is a growing culture of doubt and fear around childhood immunizations.While these numbers are bad, they don’t even begin to reflect the impact that Secretary Kennedy will have on future exemptions.In response, HHS spokesperson Andrew Nixon stated, “Vaccination remains the most effective way to protect children from serious diseases like measles and whooping cough,” adding that the decision to vaccinate “is a personal one.”That last line is what’s worrying public health experts—many of whom believe the public needs firmer messaging in favor of vaccinations, not neutrality.What’s Causing the Decline?Beyond political rhetoric, a few key factors are contributing to the rise in exemptions:Pandemic Disruption: Children born around 2020 missed well-child visits during lockdowns, leading to gaps in scheduled vaccinations.Misinformation: Social media platforms continue to amplify vaccine myths, often unchecked.Policy Loopholes: Forty-five states allow religious exemptions, and 15 states permit personal or philosophical exemptions. In some places, the process to opt out is easier than completing immunization requirements.Complacency: Because vaccines have worked so well historically, many parents no longer see the diseases they’re meant to prevent—and underestimate their risks. Vaccines are often victims of their own success, once you stop seeing disease, people forget why we needed protection in the first place. Here’s what the latest CDC data reveals about vaccine coverage among kindergartners during the 2024–25 school year:MMR (Measles-Mumps-Rubella): 92.5% vaccinated (down from 92.7%)DTaP (Diphtheria-Tetanus-Pertussis): 92.1%Polio: 92.5%Total kindergartners lacking MMR documentation: 286,000This is far below the 95% coverage goal set by HHS to prevent disease spread.Why Are Experts Calling for Urgent Action?The American Academy of Pediatrics has reiterated its position, nonmedical exemptions should be eliminated. Public health leaders argue that making vaccine refusal easy puts the entire population at risk—especially children too young or medically unable to be vaccinated.“There’s a growing body of evidence that where it’s easy to get an exemption, exemption rates go up,” said a 2019 study by health policy researchers. “Removing personal-belief exemptions leads to fewer kids being left unprotected.”Several states are now reconsidering their policies. However, in others, new legislation may make it even easier to opt out. For instance, one state is introducing an online affidavit form that parents can print at home without needing any medical consultation.What’s at Stake?This year’s outbreak has already led to three deaths and dozens of hospitalizations, mostly in unvaccinated children. And the worst may still be ahead. If the trend of rising exemptions continues, experts fear a resurgence of diseases like polio, whooping cough, and chickenpox—diseases that once caused widespread suffering and death before vaccines became available.Vaccination is not just a personal choice—it’s a public responsibility. The recent CDC data serves as a warning. If exemptions continue to rise, the U.S. could see the return of once-eradicated diseases on a larger scale.