My perspective - Small price, big payoff
The Canadian Public Health Association estimates that between 1949 and 1954, 11,000 Canadians were paralyzed by the disease. The situation started to turn around in 1955, when the Salk vaccine was introduced. Canada had its last major polio epidemic in 1959, when nearly 2,000 patients were left with some degree of paralysis. In 1962, the Sabin oral vaccine was introduced to Canada and widespread vaccination brought polio under control in the early 1970s.