Where I'm from, in the 1960, the child mortality rate was ~225 per thousand. If you had 4 child, one was almost guaranteed to die before the age of 5. My grandp

Where I'm from, in the 1960, the child mortality rate was ~225 per thousand. If you had 4 child, one was almost guaranteed to die before the age of 5. My grandparents had 7 children. 6 survived. It was the reality for literally every household. Today the rate is ~25 per thousand. Look up the definition of vaccine in the dictionary and you'll know why.