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接种疫苗大致上是降低严重症状。接种得看啥疫苗.mRNA most efficient so far. vector type such as AZ, J&J one shot, Cansino, Sputnik less.再就是deactivated coronavirus type sinovac and sinopharm. 德国专家上周五说两周后进一步信息针对omicron。这两周内言之过早,存在不确定性。。。