The last U.S. polio patient using an iron lung has died. The science story is bigger than one machine.

By Amara Diallo

Martha Lillard, an Oklahoma woman who survived childhood polio and spent nearly her entire life depending on an iron lung to breathe, died June 26 at 78, her sister told The Associated Press. Her death, reported Friday, closes a very specific American chapter: Lillard was described by her family as the last known U.S. polio patient still using the barrel-shaped negative-pressure ventilator that became one of the most recognizable images of the pre-vaccine polio era.

The story is personal first. Lillard was 5 when polio paralyzed her from the neck down. Her younger sister, Cindy McVey, told AP that doctors once said Lillard was not expected to live past 20. Instead, she went to school by intercom, traveled with her family in a custom trailer built around the size of the machine, lived alone for years, wrote poems and songs, volunteered in animal rescue, met the man who became her husband online, and kept adapting as the technology that sustained her grew rarer around her.

But the science story is not nostalgia for a strange old device. It is a reminder of three things that can be true at once: vaccination can push a terrifying disease out of everyday life; survivors can live for decades with the consequences of infections that society later stops seeing; and medical systems have to decide what they owe to the people left dependent on older, specialized technologies after a public-health victory moves on.

According to AP, McVey attributed her sister’s death to the effects of long-haul COVID-19, while a death certificate listed chronic pulmonary failure and post-polio syndrome as causes. Lillard had less than 25% lung capacity before COVID-19, McVey said, and in the last two years of her life she was in the iron lung nearly 24 hours a day.

That detail matters because polio is often told as a story with a clean ending: a virus, a vaccine, an elimination milestone. The real ending is messier. The United States eliminated routine spread of polio in 1979, but elimination did not erase the bodies, lungs, muscles, care routines and engineering dependencies created before vaccines changed the risk map.

What an iron lung did

An iron lung is not a cure for polio. It is a breathing machine built around a mechanical workaround.

Polio can invade the nervous system and, in the worst cases, paralyze muscles. When the muscles that help a person breathe are weakened or immobilized, the person needs artificial breathing support. The iron lung, developed before modern portable ventilators became standard, enclosed most of the body in a sealed chamber. By changing air pressure around the chest, the machine helped pull air into the lungs and push it back out. The patient’s head remained outside the chamber.

For Lillard, that technology became part of daily life. AP reported that she slept in the cylinder; as a child, she attended school in person only part of the day and was tutored the rest of the time; later she used a telephone and intercom system to participate in high school classes. Her family arranged travel around whether hotel doors could fit the equipment she needed to sleep.

The machine also became a maintenance problem. AP reported that in recent years McVey and Lillard were desperate to find someone who could repair the iron lung. That is not a side note. It is a predictable failure mode for rare life-sustaining technology: once a device has nearly disappeared from clinical use, the parts, technicians, institutional knowledge and emergency backups get harder to find.

The public-health triumph of polio vaccination did not make Lillard’s machine less necessary to her. It made it more unusual.

Why polio scared families so deeply

Polio, or poliomyelitis, is caused by poliovirus. The World Health Organization describes it as a highly infectious disease that can invade the nervous system and cause total paralysis within hours. WHO says the virus spreads mainly person to person through the fecal-oral route, and less often through contaminated water or food.

Most infections do not look like the nightmare image of paralysis. The College of Physicians of Philadelphia’s History of Vaccines project notes that many polio cases are asymptomatic and that a smaller share involve mild viral symptoms or non-paralytic illness. But the risk that made polio so feared was the severe end of the spectrum: paralysis, breathing failure and death.

WHO’s current fact sheet states that one in 200 infections leads to irreversible paralysis, usually in the legs. Among people who are paralyzed, WHO says 5% to 10% die when breathing muscles become immobilized. The same fact sheet says polio mainly affects children under 5, though any unvaccinated person can contract it.

That is the scientific backdrop to the images many older Americans remember: children in wards lined with iron lungs, parents afraid of summer outbreaks, swimming pools and public gatherings shadowed by disease anxiety. It is also the backdrop to why the vaccine mattered so much when it arrived.

Vaccines became available in the United States starting in 1955, AP reported. Citing the federal Centers for Disease Control and Prevention, AP said national vaccination cut annual U.S. cases to fewer than 100 in the 1960s and fewer than 10 in the 1970s. In 1979, polio was declared eliminated in the United States, meaning it was no longer routinely spreading here.

That last phrase is important: eliminated is not the same as globally eradicated. It means a disease is not continuously spreading in a defined area. It does not mean the virus has vanished worldwide, or that vaccination can be ignored.

The global eradication campaign is close, but not done

The global polio fight is one of the largest public-health campaigns ever attempted. WHO says the World Health Assembly adopted a resolution for worldwide eradication in 1988, launching the Global Polio Eradication Initiative. Since then, WHO says wild poliovirus cases have fallen by more than 99%, from an estimated 350,000 cases in more than 125 endemic countries in 1988 to ongoing endemic transmission in two countries.

That is a stunning reduction, and it is one reason the iron lung can feel like an artifact from another civilization. But “almost gone” is the dangerous part of eradication work. WHO warns that failure to stop transmission in the remaining areas could lead to global resurgence. The logic is blunt: as long as poliovirus circulates anywhere, unvaccinated or under-vaccinated communities elsewhere remain vulnerable to importation.

In the United States, the current vaccine system is built around inactivated polio vaccine, or IPV. The CDC recommends four doses of polio vaccine for children as part of routine immunization. CDC says IPV has been the only polio vaccine given in the United States since 2000 and that most adults born and raised in the United States can assume they were vaccinated as children, unless there is a specific reason to believe otherwise. Adults at increased risk — including some travelers, laboratory workers, healthcare workers and people identified by public-health authorities during an outbreak — may need vaccination or a one-time booster depending on their status and risk.

That guidance is practical, not dramatic. It is also the quiet machinery behind the absence of iron lung wards in modern American childhood.

Survivors do not disappear when transmission does

Lillard’s death also brings post-polio syndrome back into view. AP reported that her death certificate listed post-polio syndrome along with chronic pulmonary failure. Post-polio syndrome can appear years after the initial infection in some polio survivors, with new muscle weakness, fatigue, pain or breathing and swallowing problems. The condition is not the same as active poliovirus infection; it is part of the long tail of damage after the original disease.

That distinction matters because public conversation often treats infectious disease in binary terms: infected or recovered, outbreak or over, emergency or normal. Polio shows how incomplete that frame can be. A virus can stop spreading routinely in a country while survivors continue living with paralysis, respiratory compromise, mobility limits and equipment needs for the rest of their lives.

COVID-19 made that lesson newly visible for another generation. McVey told AP that Lillard had COVID-19 twice during the pandemic and that her breathing became harder in her final years. Shadowfetch is not independently verifying the causal weight of COVID-19 in Lillard’s death; the available reporting attributes that statement to her sister, while the death certificate causes cited by McVey were chronic pulmonary failure and post-polio syndrome. The careful version is this: Lillard’s case sits at the intersection of old viral injury, fragile respiratory reserve and a newer virus that her family says worsened her condition.

That is not a reason to flatten polio and COVID into the same disease. It is a reason to recognize a shared public-health truth: the damage from infections can extend beyond the headline phase, especially for people who already live close to the edge of respiratory or neuromuscular capacity.

The maintenance problem hiding inside medical progress

One of the most striking details in AP’s account is not the age of the iron lung. It is the repair problem.

For most readers, the idea that a person could be dependent on a machine so rare that finding a repair expert becomes an emergency sounds like a museum problem. For disability communities and people with complex medical needs, it sounds less exotic. Ventilators, wheelchairs, feeding pumps, communication devices, home modifications and backup power systems all create forms of infrastructure dependence. When that infrastructure is common, there are supply chains and technicians. When it becomes uncommon, people can become stranded between medical history and modern care.

The iron lung is a particularly vivid example because it belongs visually to another era. But the ethical question is contemporary: when public health succeeds at preventing new cases of a disease, what systems remain for the people already harmed? A disease can become rare enough that the market stops caring before the last patient stops needing help.

Lillard’s life also complicates the usual “medical miracle” framing. The machine helped keep her alive, but survival was not only mechanical. It depended on family labor, adapted schooling, home routines, internet access, repair hunting, community support and her own choices. AP’s reporting makes clear that Lillard was not just a patient in a device. She was a person building a life around a body and a machine that required constant negotiation with the world.

That is the part public-health storytelling often misses. Vaccines prevent disease at population scale; care systems determine what life looks like for the people who were not protected in time.

What readers should take from this

The immediate news is that Martha Lillard has died at 78 after more than seven decades shaped by polio and the iron lung that helped her breathe. The broader science news is that an iconic technology from the polio era has effectively passed out of living U.S. use, even as the scientific and public-health obligations behind it remain active.

First, vaccination changed the country’s relationship with polio. It turned a disease that once produced annual fear and thousands of paralysis cases into something most U.S. families do not encounter directly. That absence is not luck. It is the result of immunization, surveillance and public-health work that has to be maintained even when memory fades.

Second, elimination is not eradication. WHO’s data show extraordinary global progress, but the agency still warns that continued transmission in the remaining endemic areas can threaten broader resurgence. Polio is close enough to eradication to show what science and public health can do; it is not finished enough to treat as ancient history.

Third, survivors deserve more than symbolic attention. Lillard’s story should not be used only as a sepia-toned reminder that vaccines work, even though it is that. It should also push a harder question about long-term care: who keeps the equipment working, the homes accessible, the caregivers supported and the medical knowledge available when a disease becomes rare?

That question reaches beyond polio. Climate disasters, emerging infections, industrial exposures and chronic illnesses all create long tails. The news cycle notices the acute event. Science can measure the mechanism. Public health can reduce future risk. But communities still have to live with the aftermath.

Lillard’s sister told AP that doctors once said she would not live past 20. She lived to 78. That is partly a story about technology. It is partly a story about vaccination arriving too late for one child but early enough to spare millions of others. And it is partly a story about how a society remembers — or forgets — the people who carry the evidence of an older epidemic in their bodies.

The iron lung is fading from American life. The lesson should not.

Sources

• Associated Press: Martha Lillard, last US polio patient using iron lung, dies at 78
• World Health Organization: Poliomyelitis fact sheet
• Centers for Disease Control and Prevention: Polio vaccine recommendations
• Centers for Disease Control and Prevention: Laboratory testing for poliovirus
• College of Physicians of Philadelphia, History of Vaccines: Polio overview