My question is regarding Polio.
So this is my family history:
My maternal great grandfather had a severe case of polio crippling him before he had his 9 children, 5 out of 9 have documented cases of polio, one of them my great aunt, died at age 12. My grandmother slept in the same bed, and most likely had a very slight case of polio as well.
My curiosity is whether or not having a family history could make one more susceptible (I know there aren't any documented cases of Polio now) say from a vaccinated child being around my non-vax child. Everything else I am very confident in, but am uneasy about this one, just because of my family history.