[Parmy]

All that I know is what I have experienced. When I was a youngster, we were gathered up for polio vaccinations at our city hall. Polio was a scourge in the 1950's that was devastating.

In addition there was scarlett fever, pleurisy, TB, chicken pox, measles, rheumatic fever and so on.

We don't here of these diseases much in the present day.

Why? Probably because of vaccinations.

[SecAmndmt]

Or probably not.

The deaths from childhood diseases went down 90+% due to public health measures, such as sewage and water treatment, prior to the introduction of most vaccines. In the case of polio, the disease was redefined, which redefinition by itself lowered the rate. Moreover, infection by natural causes produces life-long immunity for most.

Vaccination is Russian roulette, and also disease Whack-a-mole. Get rid of wild chicken pox exposure, and one gets Shingles rates going up.