My mother told me about those diseases that propagated throughout the ancient times. She said that the Tuberculosis became a hopeless diagnosis in their village (Philippines). Also due to the poverty, hospitals weren't capable of giving medicines for patients. The politicians in their area decided to teach proper sanitation. But now there are medicines that can cure this dangerous airborne disease.
Cholera became a big threat also in their place. This caused death to many people. Their source of fresh water is a river where they released their execrated wastes and wash their clothes. But now, basic knowledge on filter helped them to decrease the number of infected people.
I hope the "poverty" will not become a reason for curing diseases. Diseases are everywhere. It is not nature that brought us these deadly things but... we, humanity, did it.
I agree with this wonderful article!