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2012年2月29日,MedImmune公司FluMist四价鼻内流感疫苗获美国FDA批准,用于2～29岁人群预防流感。FluMist四价疫苗是首个含有4种流感病毒株的流感疫苗,包括2种甲型流感病毒株和2种乙型
On February 29, 2012, MedImmune’s FluMist tetravalent intranasal influenza vaccine was approved by the U.S. FDA to prevent influenza in people aged 2-29 years. The FluMist tetravalent vaccine is the first influenza vaccine to contain four influenza virus strains, including two influenza A virus strains and two B