US Vaccine Skepticism Appears in Health Statistics

For two decades, the notion that the United States might lose its measles elimination status seemed unthinkable. The disease had been declared eliminated in 2000, a triumph of public health infrastructure and near-universal childhood vaccination. But in November 2025, the Pan American Health Organization announced that the Americas — including the United States — had lost that status after endemic transmission persisted [1]. The announcement was not a surprise to epidemiologists who had watched the numbers deteriorate for years. It was, rather, a grim confirmation of what the data had been signaling: America's growing vaccine skepticism is no longer an abstract cultural phenomenon. It is now etched into the country's health statistics.

Five Years of Decline

The trajectory is unmistakable. During the 2024-2025 school year, vaccination coverage among U.S. kindergartners decreased for all reported vaccines — marking the fifth consecutive year of decline [2]. MMR vaccine coverage fell to 92.5%, down from 92.7% the prior year and 95.2% during the 2019-2020 school year [3]. That 2.7 percentage-point drop may sound modest, but it crosses a critical epidemiological threshold: the CDC estimates that measles requires at least 93-95% population immunity to prevent sustained outbreaks [4].

The decline is not uniform. Non-medical exemptions from school vaccination requirements reached an all-time high of 3.4% nationally in 2024-2025, up from 3.3% the year before, while medical exemptions remained stable at 0.2% [2]. In at least 21 states, lawmakers introduced bills in 2025 to broaden the reasons parents can exempt children from vaccines without medical necessity [5]. West Virginia's Governor Patrick Morrisey issued an executive order requiring the state to allow religious exemptions — a significant shift for one of only four states that had previously permitted only medical exemptions [5].

Source: CDC SchoolVaxView / CIDRAP

Data as of Aug 4, 2025CSV

The Measles Crisis

The consequences arrived with devastating speed. For the full year of 2025, the United States recorded 2,283 confirmed measles cases — the highest since 1992 [1]. By March 5, 2026, another 1,281 cases had already been reported, with 89% of those cases linked to active outbreaks [6]. South Carolina alone reported 991 cases centered around Spartanburg County [6].

The demographics of the outbreak underscore the role of vaccine refusal. Approximately 93% of confirmed cases occurred in people who were unvaccinated or whose vaccination status was unknown [7]. Thirty percent of cases were in children under five. Among hospitalized children in that age group, the rate was 23% — nearly one in four [7]. Three deaths were confirmed: two unvaccinated children in Texas and an unvaccinated adult in New Mexico. A child in Los Angeles County also died from a measles-related complication [7].

These are not statistics from a developing nation struggling with vaccine access. They are from the wealthiest country on Earth, where MMR vaccines are free to children through the Vaccines for Children program.

Beyond Measles: A Broader Retreat

Measles — highly contagious and among the first diseases to resurge when vaccination rates fall — is the canary in the coal mine. But the retreat from vaccination is showing up across multiple disease categories.

Whooping cough (pertussis) saw 43,321 reported cases in 2024, the highest in more than a decade, followed by 28,783 cases in 2025 [8]. At least 13 people died from the bacterial infection in 2025, with 70% of deaths occurring in newborns under two months old — before they are eligible for their first vaccine [9]. The geographic pattern mirrors vaccine hesitancy hotspots, with the worst outbreaks concentrated in Washington, Oregon, California, and several Midwestern states [8].

Pertussis vaccination coverage among kindergartners fell below 93% in 2024, down from 95% in 2019 [8]. For maternal Tdap vaccines — which protect newborns in their most vulnerable early weeks — hesitancy increased from 31% to 43% between 2019 and 2023 [8].

Modeling studies published in peer-reviewed journals warn that if current vaccination trends continue, the United States faces significant increases not only in measles and pertussis, but also in rubella, poliomyelitis, and diphtheria [10]. While polio has not circulated in the Americas for 31 years, simulation models suggest that sustained declines in polio vaccination could lead to a return of endemic transmission [10].

The Policy Earthquake

The decline in vaccination rates preceded the current administration, but federal policy changes in 2025 and 2026 have dramatically accelerated the dynamics. Robert F. Kennedy Jr., a longtime vaccine skeptic who became Secretary of Health and Human Services, oversaw a series of changes that public health experts describe as unprecedented.

In June 2025, Kennedy fired all 17 members of the Advisory Committee on Immunization Practices (ACIP) — the expert panel that had guided U.S. vaccine recommendations for decades — and replaced them with appointees, many of whom had histories of questioning vaccine safety [11]. He also forced out several leaders at the NIH, the FDA's former vaccine chief, and a CDC director he himself had hired less than a month earlier [11].

On January 5, 2026, the CDC signed a decision memorandum reducing universally recommended childhood vaccines from 17 to 11 [12]. Vaccines for rotavirus, influenza, hepatitis A, hepatitis B, and meningococcal disease were moved from routine recommendations to "shared clinical decision-making" — a category that, while not eliminating the vaccines, signals to parents, insurers, and school systems that they are no longer considered essential [12].

The NIH simultaneously slashed billions in research funding and terminated $500 million in contracts for mRNA vaccine development [11]. The American Academy of Pediatrics and other health organizations filed a federal lawsuit challenging the revised vaccine schedule, arguing it ignored scientific evidence and violated procedural requirements [12].

The Trust Deficit

The policy changes have landed in an environment of already-eroding institutional trust. According to KFF polling, only 47% of Americans say they trust the CDC at least "a fair amount" to provide reliable vaccine information — down from 85% in early 2020 [13]. The partisan divide is stark: 55% of Democrats trust the CDC on vaccines, compared to 43% of Republicans and 46% of Independents [13].

Confidence in specific vaccines varies widely. While majorities remain confident in the safety of hepatitis B vaccines (70%) and flu vaccines for children (65%), only 48% express confidence in the safety of COVID-19 vaccines [13]. The COVID-19 experience appears to have created spillover skepticism: research published in the American Journal of Public Health found that political polarization around vaccines during the pandemic was 12 times greater than during any previous disease outbreak, including polio [14].

Source: World Bank / WHO-UNICEF Estimates of National Immunization Coverage

Data as of Feb 24, 2026CSV

America in International Context

The United States is not alone in facing vaccination challenges, but its trajectory stands out among wealthy nations. World Bank data on measles vaccination rates among children aged 12-23 months shows the U.S. at 92% in 2024 — tied with Canada but below Germany (96%), France (95%), and Japan (95%) [15]. While Germany and France have maintained or improved their rates over the past decade, the United States has stagnated.

The comparison with France is particularly instructive. After experiencing its own measles outbreaks in 2018, France made 11 childhood vaccines mandatory — a policy move that helped push its measles vaccination rate from 90% in 2017 to 95% in 2024 [15]. Germany similarly enacted a measles vaccination mandate in 2020. The United States, by contrast, has moved in the opposite direction, with the federal government reducing recommendations while states expand exemption pathways.

The United Kingdom presents a cautionary parallel. Its measles vaccination rate has declined from 93% in 2015 to 89% in 2024, and the country has faced its own measles outbreaks in recent years — a trajectory some epidemiologists see as a warning of what could follow in the U.S. without intervention [15].

The Local Impact

Behind the national statistics are local health systems under strain. In Spartanburg County, South Carolina — the epicenter of the largest 2026 outbreak — public health officials reported that their measles response consumed resources that would otherwise have gone to routine immunization, chronic disease management, and maternal health services [6]. Each measles case requires extensive contact tracing, quarantine enforcement, and post-exposure prophylaxis for exposed individuals.

Hospitals in outbreak areas have reported increased emergency department visits and admissions, with measles patients requiring isolation rooms that reduce capacity for other patients. The economic costs are substantial: a 2024 study estimated the average cost of a single measles case to the health system at approximately $32,000 when factoring in medical treatment, public health response, and lost productivity.

What Comes Next

The trajectory of U.S. vaccination rates will be shaped by several competing forces. The federal lawsuit challenging the revised childhood vaccine schedule could restore some of the removed recommendations, though legal proceedings are likely to extend well into 2026 or beyond. State-level legislative battles over exemptions continue in dozens of legislatures.

Some public health officials point to an ironic dynamic: outbreaks themselves can drive vaccination. In communities that have experienced measles firsthand, demand for MMR vaccines has surged. After the Texas outbreak in early 2025, local vaccination rates increased significantly as parents confronted the reality of a disease many had never seen [4].

But the broader trend lines remain troubling. The combination of declining trust in public health institutions, a federal government actively reducing vaccine recommendations, expanding state-level exemption pathways, and deeply partisan attitudes toward vaccination has created what one epidemiologist quoted in Nature called a "perfect storm" for the return of diseases that had been conquered decades ago [16].

The measles data is the most visible indicator, but it represents only the leading edge. Pertussis, hepatitis, and other vaccine-preventable diseases operate on longer timelines and may take years to fully manifest in population-level data. The health consequences of the decisions being made today — by policymakers, by parents, and by a society increasingly uncertain about the institutions it once trusted — will be written into American health statistics for a generation.

Data for this article was sourced from the CDC, World Bank, Kaiser Family Foundation, and peer-reviewed publications. All case counts and vaccination rates reflect the most recent available data as of March 2026.