住院率是打了二針的34倍:25.3/0.75
是打了一針的8倍:25.3/3.1
打一針住院率是二針的四倍。
推論,打一針就有保護,二針更好
住院率是打了二針的34倍:25.3/0.75
是打了一針的8倍:25.3/3.1
打一針住院率是二針的四倍。
推論,打一針就有保護,二針更好
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