Abstract
FROM MARCH 23 through June 19, 1963, 68 cases of paralytic poliomyelitis were noted on the island of Barbados among a population of 232,333, an attack rate of 29.3 per 100,000, and a dramatic increase from the annual totals of 0-7 cases recorded during the period 1952-62 (unpublished data, M.A.B.). Indeed, the only previous significant outbreak of poliomyelitis had occurred in 1933 and totaled 61 cases concentrated in the 0-5-year age group (1). During the 1963 epidemic in this circumscribed population, careful epidemiologic olbservations showed abrupt termination of the outbreak temporally related to the mass islandwide administration of oral poliovirus vaccine. The epidemiologic features of t.he outbreak, particularly as related to the attempted control measures, will be discussed in some detail.
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