No problem.
It isn't something that you think about at first. You just see the graph and it looks "right". But then when you think of the immense advances in basic medical care that occurred around the turn of the last century (punctuated by the First World War), you can see that it makes sense that more sick people are given the chance to pull through with the proper support.
Tom I was being facetious. I was discussing death rates and my point was to illustrate the misuse of death rate statistics. Ergo, I posted a graph of same. If I was discussing incidence I would have posted the graph you did. Sorry for the misunderstanding though, I should not have been facetious to you.
I was born in 1932 and thank God for vaccines.
As a child I had measles,mumps,chicken pox,and scarlet fever. Quarantined for all and the entire family quarantined for the scarlet fever.
I missed polio but remember the fear when there was a bad polio summer. Two kids in my neighborhood contracted it.