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孩子打了防疫针以后到底有没有效果呢?通过以下方法可以了解。观察患病情况儿童打了防疫针,2周左右可以产生特异性
Is there any effect after the child has given the vaccine? The following methods can be used to understand. Observation of the prevalence of children playing a vaccination, about 2 weeks can produce specificity