At present we know nothing of rheumatic fever whatsoever, except that it is infectious, that the average age at which it occurs is twelve, and that if the sufferer contracts the heart weakness which it so often causes he or she has small chance of living much more than 15 years longer. That is the average age at which death comes.
I don't know how many school children there are in New York at present. I believe the figure is a million and a half. One percent of them have rheumatic hearts, so that means that there are 15,000 children and adolescents...
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