That’s not strictly true. There have been deaths, but this can be attributed to components in the vaccines that these unlucky people may have gotten at any time. There have been rare and unusual vaccine caused deaths.
In this study nobody died from vaccine. But the big thing thats not adjusted for is once you got Covid you will wear mask and won't go to restaurant, this is not adjusted for in this study.
Do you honestly think its wrong or uncommon to study a group of people who have experienced a disease? Perhaps in an effort to make them informed about their particular risks?
