There's a couple of things that could affect your calculation. First one is that, you can get covid again after having it once, immunity from exposure seems to

There's a couple of things that could affect your calculation. First one is that, you can get covid again after having it once, immunity from exposure seems to wane even faster than immunity from Vaccination. So then you're weighing the risks of vaccination against serious side-effects from the vaccine. According to (https://www.statista.com/statistics/1191568/reported-deaths-from-covid-by-age-us/ https://www.statista.com/statistics/1191568/reported-deaths-...) 4288 people in the 18-29 category have died from covid so far in the US, so even to young people , the risk is obviously not 0. Logically unless deaths from vaccination in that age group are higher than that number (which AFAIK they're not) it would seem to make sense to get the vaccine.