One also must control for physical fitness and age. Those are by far the most powerful factors correlating to severe covid morbidity or mortality. The comparat

One also must control for physical fitness and age. Those are by far the most powerful factors correlating to severe covid morbidity or mortality. The comparative disease vs vaccine risk assuredly differs between fit young FIFA players and obese geriatric persons. It may well be that even in the former case the vaccine reduces overall risk, but surely the effect is smaller than in the latter group.