translation.en: Childhood immunisation programmes with live weakened oral poliovirus vaccine (OPV) or with inactivated, injectable poliovirus vaccine (IPV) has been very effective.
translation.mt: Programmi ta' tilqim fit-tfulija bil-vaċċin tal-poljovirus orali mdgħajjef ħaj (OPV) jew b'vaċċin tal-poljovirus inattivat, injettabbli (IPV) kienu effikaċi ħafna.