My dad had weird feet.

He was born in 1942, and when he was just a few years old, he caught polio. He survived the disease, but it affected the route his legs and feet grew one foot was always a shoe sizing or two smaller than the other one. I remember being fascinated by them when I was little.

Though polio affected my father, I myself have never been in danger of contracting it.

In fact, the disease has disappeared entirely from the United States, and we’re incredibly close to eliminating it worldwide.

But as much as we should celebrate its passing, we should also remember what it was like when polio affected people everywhere. And though these photos may be somber, they should also devote us hope; they prove that we can overcome the most difficult obstacles and most pernicious infections. After all, we’ve done it before.

Check out these photos of what polio looked like when my dad was a kid .

Polio was a scourge. It could affect anyone. But it preyed most heavily on children.

A child paralyzed by polio in 1947. Photo by Keystone Features/ Getty Images.

A young patient getting fit with a respirator in 1955. Photo by Three Lions/ Getty Images.

Polio’s actually a lot older than my father was. We even have paintings of it from ancient Egypt.

This over-3, 300 -year-old Egyptian stele is thought to illustrate a polio victim. Image via Deutsches Grnes Kreuz/ Wikimedia Commons.

For most of that time, polio was content to remain quiet.

But in the 19 th and 20 th centuries, it became a killer. In 1952, an outbreak killed over 3,000 people and paralyzed over 21,000 in the U.S. alone.

Photo from Douglas Grundy/ Three Lions/ Getty Images.

Polio is a virus passed mostly through contaminated food and water. And as long as we humans were spread out, it never got the momentum to truly become a problem. But as cities grew and, ironically, better sanitation came about and removed some of our natural exposure to it, polio suddenly detected a weak spot in our defenses.

Children were most at risk of contracting the virus hence one of its common names: infantile paralysis.

Photo by Sonnee Gottlieb/ Hulton Archive/ Getty Images.

In most cases, it’s either harmless or mild, like a suit of the flu. But in some people, polio can cause serious, sometimes permanent paralysis.

A paralyzed kid at London’s Queen Mary’s Hospital in 1947. Photo by George Konig/ Keystone Features/ Getty Images.

If the virus objective up in the central nervous system, it interrupts our body’s ability to communicate with our muscles, causing paralysis. And if the paralysis lasts for a long time, the muscles themselves can start to waste away, a process known as atrophy.

This is already bad, but there’s one more cruel spin to the disease. If a child is the one who gets paralyzed, the muscle atrophy can end up affecting the route their bones grow. That’s what happened with my father and why his feet seemed so weird.

If the diaphragm was paralyzed, patients would need respirators to be able to breathe. Some respirators were portable, like this one.

A portable respirator from 1955. Photo by Hans Meyer/ BIPs/ Getty Images.

For a given value of “portable.”

Others, like the iron lung, effectively trapped you inside.

An iron lung in 1938. Photo from London Express/ Getty Images.

If you did recover, you may have still needed regular physical therapy to strengthen the atrophied muscles. Aquatic therapy was popular.

Photo by Juliette Lasserre/ BIPs/ Getty Images.

At its height, polio was one of the great public specters. People were scared of it. Public pools were closed in a misguided effort to stop the spread. Houses were quarantined.

A board of health alerting circa 1910. Image from National Library of Medicine/ Wikimedia Commons.

There were public health campaigns and donation drives to help ga research, like the March of Dimes.

A cartoon from 1943. Image from U.S. National Repository and Records Administration/ Wikimedia Commons.

Still , nobody seemed safe. Even President Franklin Roosevelt had it, although he was careful about hiding his paralysis from the outside world.

A rare photo of FDR in his wheelchair. Image from Margaret Suckley/ Wikimedia Commons.

It was one of the great scourges of its time.

Then, in the early 1950 s, Jonas Salk fabricated the first polio vaccine.

Photo by Three Lions/ Hulton Archive/ Getty Images.

Salk was a researcher and virologist who joined the fight against polio in the late 1940 s. Initially tasked with identifying different stress of the virus, Salk and his team assured an opportunity to try to prevent the disease altogether, and their work paid off.

Manufacturers began to mass produce it.

Workers at England’s Glaxo company in 1956. Photo from Fox Photos/ Getty Images.

Suddenly, people could save their children from this awful disease.

Photo by Monty Fresco Jnr/ Topical Press Agency/ Getty Images.

As people became vaccinated against it, the disease had a harder and harder hour spreading between populations. Numbers of infections started to fall.

And, slowly, polio transformed from a demonic spectre into a manageable cancer, then, eventually, into a remote memory.

A woman examines a gigantic model of a single polio virus capsule in 1959. Photo from Fox Photos/ Getty Images.

Thanks to the inoculations created by Salk and other researchers, most of the world began to forget this illnes.

Today, we’re on the cusp of eradicating polio altogether. Its last holdouts are in Pakistan and Afghanistan.

A child afflicted with polio in Afghanistan in 2009. Photo by Paula Bronstein/ Getty Images.

We’re really close. In fact, one of polio’s three stress has already been eliminated.

this April and May.

In 2015, there were only 74 recorded cases of polio in the entire world. Just 74!

A Pakistani child receives the oral polio vaccine in 2016. Photo from Banaras Khan/ AFP/ Getty Images.

Polio has no natural reservoir. It has no place to conceal. Once it’s run, it’s gone.

We might never be able to eliminate the influenza because it can hide in so many animals, like birds or animals. But polio merely infects humans. So when all humans are immunized, polio will disappear.

We’re so close to eliminating a horrible cancer thanks to researchers like Salk and workers dedicated to administering vaccinations. We can overcome the worst demons. We have before. And we can do it again .

In the future, the only place where polio will exist is in painting archives like these. And the memories of my dad’s poor feet.

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