普及计划免疫是保护儿童免受传染病危害的重要措施。但是常发现一些儿童,特别是经常迁居的儿童(流动家庭的孩子)计划免疫不规范。这样不仅起不到预防作用,有时反而会加重接种后的反应,个别甚至发生严重的意外事故。例如百白破和脊髓灰质炎疫苗的基础免疫,必须连续接种3次,每次间隔为1个月,如果只接种1次或2次,就起不到预防效果。另外,某些预防接种制品含有微量马血清,如果多次重复接种就会增加过敏发生率。因此,要使人体既获得理想的免疫力,又不增加疫苗反应,就需要准 Universal Plan Immunization is an important measure to protect children from infectious diseases. However, it is often found that some children, especially children who are regular relocated children (migrant children), plan to have immunizations that are not standardized. This will not only fail to prevent the disease, but will sometimes aggravate the post-vaccination response. Some even have serious accidents. For example, the basic immunization against diphtheria and polio vaccine must be inoculated three times in succession at intervals of one month. If only one or two vaccinations are given, the preventive effect will not be achieved. In addition, some vaccination products contain trace amounts of horse serum, which increases the rate of allergy if repeatedly vaccinated. Therefore, in order for the human body to achieve the desired immunity without increasing the vaccine response