>Eligible hospitalizations were defined as those among adults aged ≥18 years who had received SARS-CoV-2 molecular testing (from 14 days before to 72 hours after admission) and had a COVID-19–like illness discharge diagnosis† during January–September 2021

So what is that really telling us then? If you are already in the hospital and are vaccinated then its less likely that you have covid than in the alternate universe where you are in the hospital but unvaccinated. That seems useless. I guess I don't understand it.

How good is the vaccine vs immunity at keeping people out of the hospital? Or preventing death? Those are the fundamentals we would obviously care about and neither can be derived from this study. Yet the study will be presented as if it illuminates those fundamentals