There are additional questions here. How long does vaccine immunity last? How many shots do you need? Does the risk of side effects add up or is an absence of s

There are additional questions here. How long does vaccine immunity last? How many shots do you need? Does the risk of side effects add up or is an absence of side effects indicative of further shots being safe? With an endemic Covid, how often will people get an infection on average? It isn't a too trivial calculation at all.