@
R0ckyY2 "Results: Severe disease or death within 28 days occurred for 977 (29%) of 3,369 unvaccinated patients and 269 (22%) of 1,230 patients with history of vaccination or prior SARS-CoV-2 infection."
"Patients who were vaccinated or previously had SARS-CoV-2 infection were less than half as likely as unvaccinated patients to develop severe disease in the Delta and Omicron era"
不知道有没专家解释下:后一句中的“less than half”是不是把原始的数据 29%,22%做过某种 normalisation 之后再比较的结果?