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接种是预防传染病的好方法。那么,怎样知道接种是否有效呢? 一、观察患病情况。一般来讲,人体接种疫苗后2周左右产生免疫力,1个月时免疫水平最高,以后逐渐降低。如果接种疫苗2周后,不患疫苗能预防的传染病,特别是周围流行这种传染病时,仍没有被传染,这种情况说明疫苗的效果很好。比如,一名幼儿接种了腮腺炎疫苗,他所在的幼儿园或街道、村镇流行腮腺炎,该幼儿接触了患儿却没有患腮腺炎,这说明他接种的疫苗产生了很好的效果。
Vaccination is a good way to prevent infectious diseases. So, how to know if vaccination is effective? First, observe the prevalence. In general, the body produces immunity about 2 weeks after vaccination, the highest level of immunity at 1 month, then gradually decreased. Vaccination does not occur if there is no vaccine-preventable infectious disease after 2 weeks of vaccination, especially when the epidemic is endemic. This shows that the vaccine works well. For example, a young child’s mumps vaccine, mumps at his kindergarten or street, village and township where the child touched the child but did not have mumps demonstrated that the vaccination he had had had a good effect.