the changing annual vaccination status of the population and the greater than 1,000-fold drop in reported annual incidence of paralytic poliomyelitis between the early 1950s and early 1970s indicate that the control of poliomyelitis in the united states must be attributed to the use of both the inactivated poliovirus vaccine and oral poliovirus vaccine .
C0032371
poliomyelitis
C0718003
inactivated