辉瑞研究：疫苗加强针显著加强对新冠病毒变种的保护力
Voice of America
美国制药公司辉瑞(Pfizer)及其德国合作伙伴生物技术(BioNTech)星期五(11月4日)说，一项新的研究显示，他们的COVID-19疫苗加强针为成年人提供了针对奥密克戎变种及其亚变种的重大抗体保护。
(本文参考了美联社与路透社的报道。)
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