Post #2529 2.39K Apr 24, 2021, 09:09 UTC Vox 解释为什么强生的 Covid-19 疫苗的有效性只有 66%,而 Prizfer 和 Morderna 的却有 90% 以上。这意味着什么。中国产的灭活新冠疫苗,有效性大多在 50% - 80% 之间。https://www.youtube.com/watch?v=K3odScka55A YouTube Why you can't compare Covid-19 vaccines What a vaccine's "efficacy rate" actually means. Sign up for our newsletter: http://www.vox.com/video-newsletter In the US, the first two available Covid-19 vaccines were the ones from Pfizer/BioNTech and Moderna. Both vaccines have very high "efficacy…