US drug regulators have approved applications by Moderna and BioNTech/Pfizer to release a Covid-19 vaccine that specifically targets the dominant strain of the Omicron variant.
美国药品监管机构已经批准摩德纳和BioNTech/辉瑞的申请,推出专门针对主导毒株奥密克戎变体的新冠疫苗。
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