Why 1 in 6 Americans stopped using vaccination and what happened?

United States: A significant number of American parents are deviating from the nation’s long-held immunization path. Fresh insights from a Washington Post–KFF survey reveal that parents opting to delay or completely forego childhood vaccines are more inclined to homeschool, identify as White and devoutly religious, lean Republican, or belong to the younger age bracket under 35.

This comprehensive poll—the most layered look in recent memory at parents’ practices—unveils that nearly one in six guardians have either postponed or omitted standard shots for their children, setting aside coronavirus and influenza. Alarmingly, nine percent have bypassed crucial protections like polio or the measles-mumps-rubella (MMR) vaccine, a decision that public health specialists warn could spark deadly flare-ups of diseases once suppressed.

The underlying driver is less about access and far more about fear. Parents resistant to medical advice cite apprehension over side effects and potential harms as their main concern. Nearly half of all parents express mistrust in federal health institutions to guarantee safety, mirroring a broader erosion of trust traced in multiple national polls.

Since the pandemic, skepticism toward vaccines has deepened, especially among Republican-aligned households. This summer, 2,716 parents were surveyed, yielding a layered portrait of why some reject immunizations—though the majority still affirm support for vaccines as a vital shield.

“We still see wide endorsement of vaccines among parents nationwide,” explained Liz Hamel, vice president at KFF. “But it’s uncertain if these small fractures in confidence, particularly among younger parents, will solidify into widespread resistance.”

When measured against school-required vaccines, coronavirus and flu shots sit lower on parents’ priority lists. Roughly half—52 percent—skipped flu immunization for their children last year, compared to 41 percent who complied. CDC figures reveal flu shot coverage held steady for a decade, only to decline after 2019. Federal numbers also show a meager 13 percent of eligible children received last year’s coronavirus dose.

The urgency, experts stress, intensifies around highly contagious diseases like measles. Herd immunity requires vaccination levels above 95 percent; yet current CDC estimates place kindergarten MMR coverage at 92.5 percent. Pockets of under-vaccination exist—West Texas, for instance, endured the nation’s worst measles surge in more than three decades. Exemption claims on religious or other grounds are also rising.

Public health leaders voice further concern under the stewardship of Health and Human Services Secretary Robert F. Kennedy Jr.—a longtime vaccine skeptic. His appointment has stoked unease as he reopens debates and reviews long-established immunization norms. Medical associations counter his claims, emphasizing decades of rigorous evidence affirming vaccine safety.

The CDC warns that stretching or delaying the vaccine schedule strips children of crucial protection precisely when vulnerability peaks. Pediatricians caution against assuming natural immunity surpasses vaccine-induced immunity; history shows otherwise. Chickenpox, before vaccination, killed up to 150 people annually and sent thousands to hospitals. Immunizations scheduled in early life are designed to shield the youngest and prevent them from spreading illness in communal settings.

The poll underscores that fear of adverse effects dominates parental reasoning, eclipsing barriers such as cost or access by more than fourfold. Practical hurdles rank lowest on the scale of objections.

For some, the hesitation is not outright rejection but discomfort with the rigid schedule. Ally Barlow, a 31-year-old Arizona mother with a PhD in civil engineering, calls vaccines a “modern medical marvel” but argues that the system prioritizes convenience over nuanced parental choice. She delayed her daughter’s chickenpox shot and has so far vaccinated her son only against measles and tetanus, citing his health complications.

“Let’s have an honest conversation about documented side effects,” Barlow said, “instead of framing it as a moral mandate from government or branding parents as irresponsible.”