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Poliomyelitis (/ ˌ p oʊ l i oʊ ˌ m aɪ ə ˈ l aɪ t ɪ s / POH-lee-oh-MY-ə-LY-tiss), commonly shortened to polio, is an infectious disease caused by the poliovirus. [1] Approximately 75% of cases are asymptomatic; [5] mild symptoms which can occur include sore throat and fever; in a proportion of cases more severe symptoms develop such as headache, neck stiffness, and paresthesia.
In children, paralysis due to polio occurs in one in 1,000 cases, while in adults, paralysis occurs in one in 75 cases. [24] By 1950, the peak age incidence of paralytic poliomyelitis in the United States had shifted from infants to children aged 5 to 9 years; about one-third of the cases were reported in persons over 15 years of age. [25]
Chicago had seen one instance of distance learning by radio five years earlier, in 1932, when, after the Chicago Board of Education cancelled summer school due to lack of funding, NBC privately produced a Summer School of the Air on their station WMAQ. For this program, NBC employed their own educators and printed their own textbooks. [6] [7]
Polio is an infection caused by a virus that mostly affects children under 5. Most people infected with polio don’t have any symptoms, but it can cause fever, headaches, vomiting and stiffness ...
Roberts contracted polio at the age of fourteen in 1953, two years before the Salk vaccine ended the epidemic. [1] He spent eighteen months in hospitals and returned home paralyzed from the neck down except for two fingers on one hand and several toes. He slept in an iron lung at night and often rested there during the day.
In the 19th and 20th centuries, frequent polio outbreaks made it one of the most feared diseases in the US, with the biggest outbreak killing more than 3,000 people in 1952, according to US public ...
At age five his right arm was withered by a bout of polio. Chandrasekhar used his right hand for bowling which led to his distinctive style. [172] Walt Davis: 1931-2020: Olympic gold medallist in the high jump, and later a basketball player in the NBA. He caught polio, aged nine, and could not walk for three years. [173] W. Harry Davis: 1923–2006
Most people infected with polio don’t have any symptoms, but it can cause fever, headaches, vomiting and stiffness of the spine. In severe cases, polio can invade the nervous system and cause paralysis within hours, according to the WHO. The U.N. agency estimates that 1 in 200 polio cases results in permanent paralysis, usually of the legs.