[Epidemiological aspects of poliomyelitis in Mali (author's transl)].

1800 cases of poliomyelitis has been observed in Mali during 8 years from 1968 to 1975. Children, and specially infants from 6 months to 2 years are specially concerned with a sex-ratio giving a higher frequency in boys though this difference goes decreasing with age. The dry season and the hotter one are the two periods of great morbidity. The three types (I, II, III) have the same importance. Oral immunization at the age of 3 or 4 months must be extended.