It also suffered from the fact that it was originally billed as infection preventing before they backtracked to severe symptom prevention, and frankly, the way the studies were designed, that was all they ever should have claimed. Part of me feels bad about writing these stories last year as I am very pro-vax but there is much to be learned from how this was handled: https://medium.com/grab-a-slice/pfizer-and-moderna-vaccines-95-efficacy-are-opinions-which-fail-the-federal-standards-for-d271e2f2a3b0