重贴一次：BNTX与PFE疫苗的效果分析本来是更早进行的，后来被推迟了。看PFE自己今天发布的消息：

https://www.pfizer.com/news/press-release/press-release-detail/pfizer-and-biontech-announce-vaccine-candidate-against

....”After discussion with the FDA, the companies recently elected to drop the 32-case interim analysis and conduct the first interim analysis at a minimum of 62 cases. Upon the conclusion of those discussions, the evaluable case count reached 94 and the DMC performed its first analysis on all cases.  ...

原定计划出现32例感染后开始分析，和FDA商谈后推迟到62例感染，实际是等到出现94例感染后才开始分析的。