immunisation

Childhood immunisation programmes have virtually eliminated diseases such as polio in many countries.儿童免疫接种计划实际上已经消除了许多国家的小儿麻痹症等疾病。

Gaps in immunisation coverage leave populations vulnerable to preventable outbreaks.免疫覆盖率的漏洞使人群容易受到可预防的疫情爆发的影响。