The VAST majority of the eradication of those diseases came before vaccines were introduced. The reason why is because of widespread sanitation such as community water and sewage systems. The saviors of mankind from these diseases are the engineers and laborers who designed and installed these systems all over the world. Add to the the year-round availability of nutritious food via shipping. Here's one of many graphs from public health agencies:

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This is the article that the graph is from:

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