Different people react differently. Just like any other virus (see: smallpox and polio). We saw bad-ass MMA fighters absolutely pounded by Covid. We saw past

Different people react differently. Just like any other virus (see: smallpox and polio). We saw bad-ass MMA fighters absolutely pounded by Covid. We saw pasty, wimpy Hollywood actors get through Covid with barely a sniffle. The problem is that you don't know which Covid group you are in until after you get infected with it. This is why we vaccinate.