美国食品及药物管理局 FDA 最近首次批准了一种鼻喷剂型的流感疫苗 FluMist,这对于某些因惧怕打针而不愿接受免疫者显然是个好消息。根据专家介绍,FluMist 和其它注射剂型的流感疫苗一样也含有三种被认为会在2003年～2004年流行的流感病毒株,但它也是头一种获准在美国上市的活流感病毒疫苗,即这些病毒株经过了相应的处理而使之不能在体温条件下正常生长、只能适当复制以产生免疫力。FDA 的生物制品评价和研究中心的 The FDA recently approved for the first time a nasal spray-based flu vaccine, FluMist, which is clearly good news for some who are unwilling to receive an immunization for fear of injections. According to experts, FluMist, like other flu shots injections, also contains three influenza strains that are believed to be prevalent in 2003-2004, but it is also the first live flu vaccine licensed for marketing in the United States, The virus strain is treated so that it can not grow normally under body temperature and can only be replicated properly to produce immunity. FDA’s Center for Biologics Evaluation and Research