UKPolioincidence1921-53.jpg

Polio incidence (case and death rates per 100,000) in England, Wales, Scotland, Northern Ireland, Republic of Ireland, 1921-1953 (Matthieu-Jean Freyche and Johannes Nielsen, "Incidence of Poliomyelitis Since 1920," in Poliomyelitis (Geneva: World Health Organization), p. 64)