Poster (in English) presented at the World Congress of the World Society for Pediatric Infectious Diseases (WSPID 2005)

An important and quite exceptional investigation, documenting that gradual replacement of the first doses of the oral, live polio vaccine (OPV) by the inactivated polio vaccine (IPV) in the Polish childhood immunization schedule, did not eliminate sporadic vaccine-associated paralytic polio (VAPP) adverse events. Both vaccines were used concomitantly in Poland for 10 years, taking as granted WHO guidelines based on some old evidence that replacement of the first doses of OPV prevents the ocurrence of VAPP. This subject is not actual anymore in Europe, but many countries could use this evidence when deciding to replace OPV vaccines. Unfortunately, we never managed to publish this analysis :(