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I’m sure that is “relative” risk of 52%, the “absolute” risk is probably much much lower.

“Outcome Reporting Bias in COVID-19 mRNA Vaccine Clinical Trials,” argues that when reporting results from coronavirus vaccine trials, they should be giving absolute risk rather than relative risk. These have the same numerator, different denominators. Let X be the number of cases that would occur under the treatment, Y be the number of cases that would occur under the control, and Z be the number of people in the population. The relative risk reduction (which is what we usually see) is (Y – X)/Y and the absolute risk reduction is (Y – X)/Z. So, for example, if X = 50, Y = 1000, and Z = 1 million, then the relative risk reduction is 95% but the absolute risk reduction is only 0.00095, or about a tenth of one percent.

https://patient.info/news-and-features/calculating-absolute-risk-and-relative-risk

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