Civilizations do not lose their achievements all at once. They abandon them one decision at a time.
There is a distinction worth making right now, as the United States approaches the formal loss of its measles elimination status.
Bangladesh is in the middle of a measles crisis. The country has reported over 100,000 suspected cases since March 2026. It had just 125 in 2025. Vaccine coverage there has fallen from around 90 percent to roughly 57 percent — well below the 95 percent threshold needed to prevent outbreaks. Children are dying. The Lancet has called it an immunization emergency.
The people of Bangladesh didn’t choose this. It is the product largely of bureaucratic missteps. Experts on the ground are rushing to get needles into arms. They know the vaccine is the unequivocal answer.
The United States is also in the middle of a measles crisis. We have crossed 2,000 cases in 2026 alone, on pace to exceed 2025's record of 2,289. A child named Kayley Fehr, six years old, died of measles in February 2025 — the first measles death in the United States in a decade. Eight-year-old Daisy Hildebrand died weeks later. Another person died later that year in New Mexico. After Kayley died, her parents said their position on vaccination
.
The United States doesn't have Bangladesh's problem. We have the vaccine. It is safe, basically free, and spectacularly effective. Two doses of the MMR vaccine confer roughly 97 percent protection against a virus so contagious that a single infected person can pass it to 15 others in a room they have already left. Our problem is not access. It is choice.
That is the distinction. Bangladesh is fighting measles against its will. We are welcoming it.
Measles is not a mild illness. It has never been a mild illness.
This framing — that measles is a rite of passage, a manageable childhood experience, something that children power through and emerge from stronger — is a dangerous lie in circulation today. And it has currency in a way that would have been unthinkable to any generation that actually knew the disease.
The numbers from the 2025 Texas outbreak, published by the
, are not abstract. Among the early 325 cases, 60 patients — nearly one in five — required hospitalization. Among the hospitalized children, 91 percent had no underlying health conditions. These were not medically fragile children. Among those hospitalized, 72 percent developed pneumonia. Thirty-eight percent required supplemental oxygen. Four were admitted to intensive care. Two required mechanical ventilation. Children needed machines to breathe because they had measles.
The general statistics are equally clear. About one in twenty people who contract measles develops pneumonia. About one in a thousand develops encephalitis — a brain infection that can cause permanent disability. About one in a thousand dies, and in communities with limited health infrastructure, considerably more. This is not a rough cold. This is not a mild fever and a rash. This is a serious illness that our grandparents feared, and that still kills around 100,000 people globally every year.
But there is one dimension of measles that even many vaccine advocates underestimate, and it is the most important argument against the "natural immunity is better" position. Measles causes immune amnesia.
The immune system works partly by maintaining a memory — a record of every pathogen it has ever encountered. When a familiar threat returns, the immune system is ready. Measles systematically deletes that memory. A child who survives measles may survive the immediate illness. But the virus has reached into the immune system and erased months or years of learned defenses against other diseases. For a period that can last up to a year, that child is newly vulnerable to infections their immune system had already learned to manage. When the measles vaccine was introduced around the world, researchers noticed something: overall childhood deaths fell by more than you would have expected from stopping measles alone. The explanation is immune amnesia. Fewer children were getting measles, so fewer children were losing their immune memory and becoming newly vulnerable to everything else.
The people who argue that it is better for children to get measles "naturally" — who throw measles parties, who seek out "natural immunity" as though it were a superior product — are asking for something far worse than they understand. They are asking for the disease, the immediate danger, and then a prolonged immune vulnerability that follows. The vaccine delivers immunity with zero of those costs.
The Triple Denial: Deny the severity of measles, Exaggerate the Risks of Vaccination, and Deny the Benefits of the vaccine
The anti-vaccine argument around measles rests on three specific falsehoods, deployed in combination.
First: measles isn't that bad. We have dealt with this above. The data says otherwise. The children in Texas on ventilators say otherwise. The three funerals say otherwise.
Second: the vaccine risks are serious and underreported. The MMR vaccine's risk profile is among the most thoroughly documented of any medical intervention on earth, having been administered to hundreds of millions of people over six decades. Side effects are overwhelmingly mild. Serious adverse events are vanishingly rare and well understood. The autism claim — the one that launched the modern anti-vaccine movement — was fraud.
Andrew Wakefield published a paper in 1998, funded by attorneys preparing litigation against vaccine manufacturers, with data he had falsified. His medical license was revoked. The paper was retracted. Twelve co-authors withdrew their names. What followed was a decade of scientific resources dedicated to disproving a manufactured claim — resources that could have gone toward actual research on autism's causes.
The claim survives anyway. That is what it means for falsehood to be entrenched in ideology rather than evidence: it does not respond to disconfirmation.
Third: the vaccine's benefits are overstated. The argument runs that measles mortality was already declining before the vaccine arrived in the 1960s, thanks to better nutrition and modern medicine. This contains a grain of truth, but it is not the full story. Yes, better care reduced measles mortality in industrialized countries before the vaccine. But mortality was not going to zero. It was never going to zero on that trajectory. One in twenty cases still produced pneumonia. One in a thousand still produced encephalitis. And the vaccine did what nutrition alone could never do: it drove transmission toward zero, which was the only way to stop children from getting sick in the first place.
You cannot reach measles elimination through improved pediatric nutrition. You can only reach it with a vaccine.
This is happening by choice
I have written before that measles is the default state of the world. For almost all of human history, every child got measles. Measles elimination is not the natural condition of humanity — it is a human achievement, requiring continuous maintenance. Civilization itself is not self-sustaining. Achievements decay when people stop defending them.
The United States is watching this achievement decay in real time, and we are not its victims. We are the authors.
Our kindergarten vaccination rate is 92.5 percent nationally, and in many individual communities it is far lower. The 95 percent threshold for herd immunity — the level at which the virus cannot find enough susceptible people to sustain transmission — is not a technicality. It is the line between control and outbreak. We are below it in enough communities that measles, when it arrives, finds fertile ground.
Bangladesh is below the herd immunity threshold because maintaining those programs in a resource-constrained country with governmental disruption is genuinely difficult. Bangladesh is fighting a circumstance.
We created ours.
The philosophical exemptions, the religious exemptions, the online misinformation ecosystems, the nihilist HHS secretary who promotes vitamin A as a response to US measles cases, the neutered advisory committees, the paralyzed CDC: all of this is the accumulation of choices. And the people who made those choices are now watching children be hospitalized at rates we have not seen in decades.
The parents whose children are getting sick did not, in most cases, ever see measles themselves. They grew up in a vaccinated world where measles had been made invisible, and they concluded from that invisibility that it was not dangerous. They heard that conclusion reinforced by a movement that has been building for decades, and they made a decision. They did not make that poor decision solely for themselves, they also made it for their children.
Choosing, on your child's behalf, a lower standard of health and safety than is freely available to them is to sacrifice them.
This is not a tragedy of ignorance. It is a tragedy of evasion. The information is available. The vaccine is ubiquitous. The record of measles' severity is documented, published, and visible to anyone willing to look. The deaths are public record.
What Comes Next: Losing Elimination Status
The Pan American Health Organization will formally review the United States' measles elimination status in November 2026. I expect us to lose it. The genetics make this clear: what we are experiencing is not a series of disconnected imported outbreaks. There exists one continuous chain of transmission tracing back to West Texas in January 2025 into the present day. By June, the outbreak had reached over 2,100 cases nationally in just 6 months. Positive measles wastewater is discovered in places with no confirmed cases, which means the real number is higher.
Losing elimination status is not just an abstraction, we don’t have to return a trophy. It signifies that measles is here, circulating, and self-sustaining. It is re-establishing endemicity. It means airports, school quarantines, and pediatric emergency department visits will become routine features of life in the US. It means infants who cannot yet receive the vaccine — the first dose is usually given at 12 to 15 months — will live in a country where they have been deliberately put at genuine risk.
This is what it looks like when a civilization decides that an achievement is not worth maintaining. The vaccine has not changed. The virus has not changed. The biology has not changed.
We have.
The fix is not complicated: get measles vaccination rates above 95 percent in every community, tighten exemption policies, and be honest about what measles is and what the vaccine does. Healthcare providers will be doing this work even as the national advisory infrastructure has been deliberately weakened. The knowledge is there. The tools are there. The question is whether the will is.