Is It True That the Benefits of Health and Longevity Are Exclusive to Rich Countries and to Poor Countries?

Is it true that the benefits of health and longevity are exclusive to rich countries? The world is vastly wealthier than it was. But poor countries have seen huge increases in life expectancy above and beyond their increases in wealth. Even though gold plated medical care can extend the life of a seventy five year old, but basic measures like sanitation,. clean watera mosquito control can really stretch the life spans in poor countries....