Control of Poliomyelitis by Vaccination in Belgium

This article reviews the epidemiologic impact of the immunization policies in Belgium since the time efficacious vaccines became available, including recent serologic and virologic surveys as well as evidence for the relative effectiveness of inactivated poliovirus vaccine (lPV) and oral poliovirus vaccine (OPV) in routine immunization programs. Poliomyelitis as an indigenous disease has disappeared in Belgium since the late 1960s as a result of immunization with IPV from 1958 to 1969 and with OPV since 1963. In the immediate prevaccine era, the annual average number of cases of paralytic poli... Mehr ...