Vacunación antipoliomielítica en ni？os de la Ciudad de Buenos Aires

following the presentation of a confirmed case of paralytic polio sabin-derived virus (vsd) in a child of 15 months we analyzed the coverage of poliomyelitis vaccination in children living in the city of buenos aires, in the 2006/2008 triennium. there was an improvement over the period analyzed, but values above 95% were reached only for the first dose. the proportion of inactivated vaccine (ipv) increased at the expense of live oral vaccine (opv); in 2008, the first dose ipv coverage was 37.64% and 19.48% for the school entrance. the lack of intestinal immunity that occurs in children immunized with ipv, plus a poor coverage with opv, allows the circulation of wild virus or vsd favoring the occurrence of paralytic poliomyelitis in unvaccinated or immunocompromised children.