综合外媒报道,各国积极接种新冠肺炎疫苗,但随着变种病毒迅速扩散,疫苗效力是否打折引起忧心。美国国家过敏与传染病研究院(NIAID)院长福奇建议,最好的方式就是接种疫苗2次,如此才能终结疫情。
报道说,福奇当地时间周一(8日))在白宫防疫简报上表示,“我们认为最好的方式就是持续推进大众接种第一剂疫苗的速率,接著他们就能在适切时间施打第二剂。”美国现阶段核准的新冠肺炎疫苗为辉瑞与莫德纳所研制。
美疫苗学家奥菲特则说,单只注射一剂还不足以终结疫情,“如果你在注射第一剂后免疫反应较弱,那么你的身体可能只是在伤害病毒,而不是在消灭它”、“如果不消灭它,那病毒仍有可能发生变异。”
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