It is very random and i think we are still early in our understanding of it. I understand that you are less likely to have a serious adverse reaction if you are young, healthy, etc. However, I feel it is disingenuous to pretend that if you are young, healthy, etc, it is something you should ignore or pretend like it is the common cold or the flu. There are some weird things this virus does and being in good shape is not a silver bullet. That's not me saying "mandate vaccines," that's me saying, "don't pretend like it's a common cold."