Babies are dying from a condition that pediatricians have known how to prevent for decades, and the common link in many of these cases is a vitamin K shot parents declined at birth. The injection is routine, inexpensive and widely recommended, yet doctors say a growing number of families are turning it down because of misinformation, fear of medical intervention and social media claims that distort the science.
The result can be catastrophic. Records reviewed in recent years show newborns who first seemed healthy, passed screening tests and even reached early checkups before suddenly developing seizures, breathing problems, vomiting or unexplained bleeding that quickly turned life-threatening.
A preventable bleeding disorder
Vitamin K deficiency bleeding can strike when a newborn’s blood cannot clot properly. Doctors say the problem can appear in the first days after birth or later, and when it does, bleeding can occur in the brain, intestines or around the body, including the belly button.
Pathologists who examined some of the babies found bleeding patterns more often seen in seriously ill adults than in newborns. In multiple autopsies over several years, the cause of death was identified as vitamin K deficiency bleeding, either alone or as a major contributor.
The concern is especially sharp because the condition is usually preventable with a single shot given shortly after birth. Nearly a century of research has supported vitamin K’s role in helping blood clot, and the intervention has long been treated as a standard part of newborn care.
Why doctors say the shot matters
Experts note that all babies begin life with very little vitamin K. Very little passes through the placenta, and breast milk contains only small amounts. Formula is fortified, but doctors still recommend the shot for newborns regardless of feeding plan.
The evidence behind the injection is strong. Research shows babies who do not get the shot are 81 times more likely to develop late vitamin K deficiency bleeding than babies who do. The CDC says 1 in every 5 babies with the condition will die.
Even so, some parents now view the injection with suspicion. Medical specialists say that hesitation has been amplified by social media posts, self-described experts and repeated false claims about safety.
A rise in refusal
Doctors say this is not an isolated issue. Some hospitals have seen refusal rates more than double, and a national study of more than 5 million births found that more than 5% of U.S. babies did not receive vitamin K at birth in 2024, up 77% from 2017.
That shift concerns pediatricians because the shot had been so successful that vitamin K deficiency bleeding nearly disappeared from everyday practice. “We’re a victim of our own success,” said Dr. Ivan Hand, director of neonatology at Kings County Hospital Center in New York and a co-author of the American Academy of Pediatrics statement on the shot.
The American Academy of Pediatrics has continued to stress that the vitamin K injection is safe and effective. Its guidance also directly answers common myths, including claims that the shot contains mercury, causes cancer or is too strong for newborns.
The role of misinformation
Doctors say many refusals begin with a desire to protect babies from unnecessary intervention. But they say that concern often rests on misinformation, not medical evidence.
Posts on Facebook and other platforms have promoted claims that the shot is harmful or unnecessary, while some families have cited commentary from podcasters and social media personalities. Pediatricians say those messages can sound persuasive because they use medical language, even when they get the science wrong.
In one recent hearing, Rep. Kim Schrier, D-Wash., asked Health and Human Services Secretary Robert F. Kennedy Jr. to reassure parents that the vitamin K shot is safe. He declined to do so, and Schrier replied that the doubt created around medicine and science was pushing parents toward dangerous choices.
An HHS spokesperson said in an email that “Vitamin K at birth” remains “the standard of care.”
Cases that alarmed doctors
The warning signs first became impossible to ignore in a cluster of cases more than a decade ago in Nashville, Tennessee. Four babies were rushed to a children’s hospital months apart after sudden illness revealed severe bleeding, and doctors later learned their parents had declined vitamin K.
All four survived after treatment, though one was left with developmental delays. The families gave different reasons for refusing the shot, including fears based on long-debunked claims that it could cause leukemia, plus a belief that newborns do not need it.
That cluster led doctors to push for more public education in birthing centers and the surrounding community. For a time, the effort appeared to work, and some clinicians believed the problem was easing.
Then refusal rates climbed again.
The scale is hard to measure
Public health officials do not track vitamin K refusal in a systematic way, which makes it difficult to know how many babies bleed, suffer brain damage or die because they never received the shot. Researchers and clinicians say that lack of data creates a dangerous blind spot.
Deaths directly labeled as vitamin K deficiency bleeding appear to be relatively few, with federal and state death certificate data showing fewer than a dozen annually, though the number has risen in recent years. But those figures likely miss many cases because deaths are often recorded as brain bleeding or another immediate cause instead.
Some doctors say the true burden is larger than the official numbers suggest. In 2024, more than 700 newborns died from spontaneous bleeding in the brain, and specialists said a meaningful share may have involved vitamin K deficiency.
“A lot of the providers don’t have this on their radar,” said Dr. Jaspreet Loyal, a pediatric hospitalist at Yale Medicine. “The lack of data is almost acting like a reassurance for families that this risk is worth taking.”
Hospitals are seeing the shift firsthand
Some hospital systems have begun tracking refusals on their own, and the numbers show a sharp rise during and after the pandemic. Mercy, which operates birthing hospitals in several states, said 1,552 babies across its hospitals did not receive the shot last year, compared with 536 in 2021.
At St. Luke’s Health System in Idaho, refusal rates have climbed every year since the start of the pandemic. In 2020, 3.8% of families declined the shot, and that rose to 9.8% in 2025, with one hospital reaching 20%.
At least two babies treated at St. Luke’s died within the last year from complications tied to vitamin K deficiency bleeding, hospital officials said. Dr. Tom Patterson, who has warned about the trend, said he suspects there may be more.
Families left with grief
Behind the statistics are parents facing losses that many never expected. Some families spoke publicly through obituaries, social media posts or fundraising pages, but those accounts often did not mention the decision to decline vitamin K.
One mother wrote that “No one could’ve prepared us for the heartbreak we faced 6 weeks after our little miracle was born.” Another family said simply, “We miss his sweet smell.”
Doctors who have dealt with these cases say the grief can be compounded by regret, denial or anger. In some families, later pregnancies led to a different decision, and the next baby received the shot.
For pediatricians, that is the most frustrating part of the trend. The science behind the injection has been settled for decades, but doctors say misinformation has reopened a problem they had nearly eliminated, putting newborns at risk of bleeding that can kill within hours or leave permanent brain injury behind.
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