根据预防免疫接种项目的不同方面， 讲课相应的分成几个单元。
The lectures are organized into modules which correspond to different dimensions of immunization programs.
欧洲免疫周宣传免疫接种每一个儿童对于预防疾病和保护生命至关重要这一核心信息。
European immunization Week promotes the core message that immunization of every child is vital, to prevent diseases and protect life.
许多儿童疫苗依赖于“群体免疫”——一定比例的人口接种某些疫苗是为了预防那些没有接种或不能接种的人受到感染。
Many of the childhood vaccinations rely on "herd-immunity" - a certain percentage of the population having the vaccine in order to protect those that do not, or cannot have it, from infection.
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