translation.en: Childhood immunisation programmes with live weakened oral poliovirus vaccine (OPV) or with inactivated, injectable poliovirus vaccine (IPV) has been very effective.
translation.pt: Os programas de imunização infantil com a vacina oral viva atenuada contra o vírus da poliomielite (VAP) ou com a vacina injectável inactivada (VIP) têm sido bastante eficazes.