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我国自1978年加入世界卫生组织(WHO)计划免疫策略以来,计划免疫的显著效果使传染病的发病率总体上控制在较低水平,保护了数以亿计的人民免于罹患过去常见的致死性疾病。虽然我国的计
Since China joined the World Health Organization (WHO) immunization strategy in 1978, the remarkable effect of planned immunization keeps the overall incidence of infectious diseases at a low level, protecting hundreds of millions of people from the common causes of death in the past Sexually transmitted diseases. Although my country’s plan