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zi yuan jie zhong de di er lei yi miao
Author(s): 
Pages: 6-7
Year: Issue:  4
Journal: Health World

Abstract: 疫苗,通过注射、口服等方式接种于人体,使人获得对某种疾病的免疫力。用疫苗预防疾病简便而有效,可使人免除罹患某种疾病的痛苦;与患病所用医药费相比,接种疫苗的费用是很低的,所以科学发展不断研究出新的
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