如何进行预防接种的效果评价？
他们对我们的儿童进行预防接种并帮助我们在患病时康复。
They vaccinate our children and help us to recover when we are sick.
进行预防接种，增加人群对伤寒的免疫力，也是预防伤寒的重要措施之一。
Vaccination, the increase The crowd of typhoid immunity, prevention of typhoid fever is also one of the important measures.
应用推荐