New data indicate Moderna's Covid bivalent booster may be more effective against currently circulating Omicron variants of the virus than its original vaccine. 数据显示,Moderna 和辉瑞后续出品的Bivalent Booster针对奥米克戎变异更新了数个RNA组合,比起老版mRNA疫苗对新COVID19变异效果不错的。mRNA疫苗通过基因重组非常快速跟踪病毒变异,比灭活疫苗的最大优势。