the greatest drops of disease occurred from hygiene improvements, public sanitation and water systems, and proper food handling/packaging improvements.
That is true to a degree. But I believe this country has had all the things you mentioned for many, many years. Now, if you want to ratchet things back to the 1800s or so, I’ll agree with you 100 per cent. That period saw wide spread epidemics of multitudes of diseases (some we don’t even hear of anymore outside of third world countries) due to lack of the things you listed.