The problems we have in the Western world are beginning to reach the 'undeveloped' world through the promotion of vaccination programs [some of which have seen infertility as a consequence ... I'm thinking particularly of the DTaP/tetanus program in parts of Africa where women and girls have reported infertility after vaccination, whether this is a deliberate or accidental consequence of the vaccinations].
In parts of urban China pollution, in particular, is a massive problem.
I work with a lot of people from the Indian sub continent and metal poisoning is a massive issue for them.
I don't think for long any population will be exempt from the rot that is brought with western style commerce & medicine.