> for a child born in the 1950s in high income countries the mortality rate was ~5%. 1 in 20 kids dead before the age of 5. Essentially all of this was infant

> for a child born in the 1950s in high income countries the mortality rate was ~5%. 1 in 20 kids dead before the age of 5. Essentially all of this was infant mortality, i.e. kids who died before the age of 1, and that in turn was more related to things like sanitation and vaccines and pre-natal screening.