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在获得有效的乙型肝炎疫苗后9年,并对各种控制乙型肝炎的方法进行尝试以后,美国疾病控制中心(CDC)咨询委员会建议把乙型肝炎列入儿童免疫计划。
After nine years of obtaining a valid hepatitis B vaccine and trying out various methods of controlling for hepatitis B, the CDC Advisory Committee recommends that hepatitis B be included in the childhood immunization program.