好久不观注疫苗了，今天学习了一下，二价欧米空疫苗效果要差，画个重点，自己看吧

Vaccine effectiveness was not assessed in this study; in an exploratory analysis, SARS-CoV-2 infection occurred in 11 participants after the mRNA-1273.214 booster and in 9 participants after the mRNA-1273 booster.

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