免疫是最成功和最具成本效益的公共卫生干预行动之一,其实施已使得天花得以消除;麻疹和脊灰在一些区域被消除;白喉、破伤风和百日咳的发病率和死亡率大幅度下降。WHO估计在2003年有200万儿童死亡因接种被预防,尽管如此,如果合理地使用现有的疫苗,更多的死亡可被预防。本报告概 Immunization is one of the most successful and cost-effective public health interventions, and its implementation has led to the elimination of smallpox; measles and poliomyelitis have been eliminated in some areas; the incidence and mortality of diphtheria, tetanus and pertussis have dropped significantly . The WHO estimates that 2 million child deaths were prevented by vaccination in 2003, although more deaths could be prevented if the existing vaccines were used reasonably. Summary of this report