As wealthy countries have got better at detecting and treating cancer, as well as reducing certain risk factors, rates of the disease have significantly reduced since the early 2000s — but in low- and middle-income countries the opposite is happening.
https://news.vice.com/article/as-western-lifestyles-are-spreading-to-poorer-countries-so-is-cancer
As Western Lifestyles Are Spreading to Poorer Countries, So Is Cancer