Previously, the confidence interval for protection against severe disease for Pfizer ran from 0% all the way up to 100% Now it goes from 88%-100%
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As the fab
@nataliexdean points out, it is unlikely that the efficacy is truly 100%, but the likelihood that vaccines are protective of ~most~ severe disease is what I was trying to get athttps://twitter.com/nataliexdean/status/1379590938897608704?s=20 …Show this thread
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Any idea on its efficacy against the P.1 variant? That one is particularly concerning
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Despite the coverage, it escapes immunity less than B.1.351 does. So, if Pfizer works against B.1.351, which it seems to do, we should be fine.
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I get the spirit of this tweet, but the statistician in me feels compelled to point out that nothing is 100%. With millions vaccinated, inevitably there are (and have been already) some breakthrough hospitalizations. Instead, I like to say that efficacy is very very high!
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Haha yes that's a good point, I should clarify that I don't think it is ~actually~ 100%

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That's pfizer, not AZN
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The results here aren't quite as spectacular, though they seem pretty damned close to spectacular. In Michigan, vaccine takers live among idiots. I've had two modernas, six weeks in. I'm hoping these deaths are edge cases.https://www.mlive.com/public-interest/2021/04/among-17-million-fully-vaccinated-michiganders-state-identifies-small-number-of-covid-19-infections-and-deaths.html …
Thanks. Twitter will use this to make your timeline better. UndoUndo
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How can anything be 100% in medicine?
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Well, zero hospitalization vs 32 could also be achieved with a 98.5% effectiveness. 98,5% of 32 is 31.52. As more data comes in, we can adjust this percentage. But weather it's 98% or 100%, the result is awesome
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