重磅!美国公布新冠疫苗接种计划!
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据CNN报道,消息人士称FDA "可能会在12月10日的会议结束时,就是否为这些疫苗颁发紧急使用授权做出决定"。
Fauci博士表示,普通美国人最快4月,就可以接种新冠疫苗啦!
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此外,目前尚并不清楚接种后能免疫多久。
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卫生专家表示医护人员应在12月底或1月初首先接种; 然后优先考虑感染或严重疾病风险人士; 基本工作者、教师、游民、监狱囚犯是下一批; 其后是儿童和年轻人等健康普通人大约4月可以接种疫苗。
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接种疫苗有多长的有效期
美国拉霍亚变态反应与免疫学研究所(La Jolla Institute of Immunology)一项研究初步显示,当一个人透过染上新冠肺炎或接种疫苗发展出抗体后,对这种病毒的免疫力可以长达数年,让公众不用短时间内重覆注射疫苗,就能让更多人接种,加快在各国人口培养对新冠肺炎病毒的免疫力。
这项研究的结果仍然需要进一步确认,但《纽约时报》指其他类似的研究也有差不多的发现。其中华盛顿大学(University of Washington)早前发现,一个人感染新冠肺炎疫毒或接种疫苗后,会发展出一种“记忆细胞”,在身体内存活最少三个月,让这些人的免疫系统随时产生可以对抗新冠肺炎病毒的抗体。
《纽约时报》引述另一名有进行类似研究的多伦多大学(University of Toronto)研究员戈默曼(Jennifer Gommerman)说,小部份新冠肺炎患者康复后对病毒只会短时间内有免疫力,但她认为这些人注射疫苗后,仍然可以对病毒有长期的免疫力。
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