most of the 13 countries that participated in this ten-year study of the incidence of acute persisting spinal paralysis ( apsp ) used trivalent live poliomyelitis vaccine ( sabin strains ) , but monovalent vaccines were used for all or part of the time in 3 countries and inactivated vaccines were used wholly by 2 countries and in part by 2 other countries .
C0042210
vaccines
C0042212
inactivated vaccines