Patterns of the epidemic process in poliomyelitis with regular live vaccine immunization of the population

The results of the study of epidemic poliomyelitis in Byelorussia in 1981-1978 are presented. Two consecutive phases of the epidemic process were established: the suppression of the infection and its elimination. In the suppression phase sporadic cases of poliomyelitis still persisted, due to reduced circulation of wild polioviruses. In the elimination phase no wild polioviruses were isolated and no cases of the disease occurred.