Franklin Delano Roosevelt most likely contracted the poliovirus in late July 1921, probably during a visit to a Boy Scout camp in New York, roughly two weeks before his symptoms appeared at his family’s vacation home in Canada. He was 39 years old, unusually old for a disease then called “infantile paralysis,” and his illness progressed from mild fatigue to complete paralysis of both legs in just four days.
The Boy Scout Camp Exposure
On July 27, 1921, Roosevelt visited a Boy Scout camp at Bear Mountain State Park in New York in his role as president of the Greater New York Boy Scouts Council. He spent time around large groups of children, some of whom may have been carrying the poliovirus without showing symptoms. Polio was circulating in the northeastern United States that summer, and children were the most common carriers.
After the visit, Roosevelt traveled to join his wife Eleanor and their children at their summer home on Campobello Island in New Brunswick, Canada. The timing fits precisely with what we know about polio’s incubation period. According to the CDC, paralytic symptoms typically appear 7 to 21 days after infection. Roosevelt’s paralysis began 14 days after the Boy Scout camp visit, placing it squarely within that window.
How Polio Spreads
Poliovirus spreads through contact with infected feces or, less commonly, through respiratory droplets. In the early 1920s, sanitation at large outdoor gatherings was inconsistent, and the virus moved easily through groups of children. Most people who caught polio never developed serious symptoms. Roughly 95% of infections caused no noticeable illness at all. A small percentage developed fever and muscle aches, and fewer than 1% progressed to the paralytic form that struck Roosevelt.
Adults who contracted polio tended to have worse outcomes than children. By the late 1800s, doctors had begun recognizing that the disease was not limited to infants, though it still carried the name “infantile paralysis.” Roosevelt’s age made his case unusual but not unprecedented.
Four Days From Fatigue to Paralysis
The progression of Roosevelt’s illness was rapid and well documented. On August 10, 1921, after swimming in the cold waters of Lake Glen Severn on Campobello Island, he felt generally unwell, with fatigue and a low fever. At the time, no one suspected anything serious.
By August 11, the pain in his back and legs had become so severe that Eleanor called Dr. Bennett, a local physician from Lubec, Maine. On August 12, both legs grew weak, and Roosevelt lost the ability to urinate on his own. By August 13, he needed help walking and was soon completely unable to move either leg. On August 14, a prominent surgeon named Dr. Keen examined him thoroughly and concluded that Roosevelt had lost the power to move his legs but could still feel sensation in them.
The combination of symptoms was alarming: fever, rapidly ascending paralysis affecting both legs symmetrically, facial paralysis, bladder and bowel dysfunction, and numbness. It wasn’t until August 25, more than two weeks after the first symptoms, that Dr. Robert Lovett, a Boston orthopedic surgeon and one of the country’s leading polio specialists, examined Roosevelt and delivered the formal diagnosis of poliomyelitis.
Why Diagnosis Took Weeks
In 1921, there was no blood test or lab work that could confirm polio. Doctors relied entirely on the pattern of symptoms and physical examination. Dr. Keen, who saw Roosevelt first, initially suspected a blood clot in the spinal cord. It was only when Dr. Lovett reviewed the full picture, including the progressive paralysis and the pattern of muscle weakness, that polio was identified.
The lack of modern diagnostic tools meant that identifying polio depended on the experience of the examining physician. Lovett was uniquely qualified. He had spent years studying spinal paralysis in children and adults, and the presentation matched what he had seen in hundreds of previous cases.
Was It Actually Polio?
In 2003, a peer-reviewed analysis reopened the question of Roosevelt’s diagnosis. Researchers pointed out that several features of his illness, including the symmetric paralysis (both legs affected equally), facial paralysis, sensory changes, and bladder dysfunction, are more consistent with Guillain-Barré syndrome, an autoimmune condition where the body’s immune system attacks the peripheral nerves. His age at onset, 39, also fits Guillain-Barré more closely than paralytic polio, which overwhelmingly struck children.
The debate remains unresolved because no definitive laboratory tests were performed in 1921, and none can be performed now. The historical diagnosis of polio stands as the accepted account, but the Guillain-Barré hypothesis has gained enough traction among medical historians that it cannot be dismissed. Either way, the result was the same: Roosevelt permanently lost the use of his legs and spent the rest of his life unable to walk unassisted.
The Lasting Impact
Roosevelt never regained the ability to walk independently. He used leg braces, a wheelchair, and the support of aides for the remaining 24 years of his life. He went to extraordinary lengths to conceal the extent of his disability from the public, rarely allowing himself to be photographed in his wheelchair and training himself to “walk” short distances by gripping a companion’s arm and swinging his braced legs forward.
His experience with paralysis shaped his political legacy in unexpected ways. In 1926, he purchased a run-down resort in Warm Springs, Georgia, where he had found that the warm mineral waters helped him exercise his legs. He turned it into a rehabilitation center for polio patients. After becoming president in 1933, he helped establish the National Foundation for Infantile Paralysis, later renamed the March of Dimes, which ultimately funded the research that led to Jonas Salk’s polio vaccine in 1955. The disease that had taken his ability to walk became one of the driving forces behind its own eventual eradication in the Western world.