Although immunization programmes have contributed significantly to child survival, coverage will remain highly inequitable until at least 80 per cent of children in all districts are immunized.
虽然疫苗接种方案大大有助于儿童生存，但是在全世界至少80％的儿童接受免疫接种以前，疫苗接种分布情况仍然会极不均衡。