Yup that’s true. They died due to disease, being killed and many other reasons.
Ngo Dinh Diem was a Vietnamese president from 1955 to 1963, in 1963 he was assassinated with his brother Ngo Dinh Nhu.
Hope that helps
True, post WW2 Japans economy boomed and especially in that time they became a world economic power and today they are still one of the strongest economies in Asia.
We still think that direct exposure to filth/decay can give us diseases and it’s probably true.