450-500 dead children/year before vaxx.
Not common, widely accepted - but tragic for families who lost a child.
Many of the dead children were in marginal health during a very different time of Healthcare. Orphanages and facilities for mentally haor physically handicapped. Would that be true today? I doubt it.
Back in the 1980’s , I helped vaccinate children in remote villages in Kenya against measles.
Back then measles was killing 35,000 children in Kenya each year.