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1前言世界卫生组织(WHO)有为各成员国提供卫生策略指导意见的职责,针对预防具有全球公共卫生影响疾病的疫苗及联合疫苗,发布一系列定期更新的立场文件。这些立场文件对免疫规划中使用的各相关疾病疫苗的基本背景信息进行了归纳,并结合当前
1 Introduction The World Health Organization (WHO) has the responsibility of providing guidance to member countries on health strategies and issuing a series of regularly updated position papers on vaccines and combination vaccines to prevent diseases with global public health impact. These position papers summarize the basic background information on vaccines used in immunization programs for all relevant diseases and, combined with the current