despite this low immunization coverage and low seroconversion rates , which were determined concurrently , the estimated incidence of paralytic poliomyelitis decreased by 85 % .a detailed study of immunized children and of children living in the same households suggests that community spread of the vaccine virus and cross-immunity may have partly been responsible for the dramatic decrease in the incidence of paralytic disease , and that competing non-polio enterovirus infection was not a cause for the low seroconversion rates .
C0032371
polio
C0014378
enterovirus infection