By Megan Wildhood
The average lifespan in the U.S. is about 78 years, and for the first time since the 1990s, it's getting shorter.
Despite spending much more on health care, Americans are sicker than people in other wealthy countries, with illnesses like diabetes, heart disease, Alzheimer's and stroke on the rise. So are "despair deaths" from drugs, alcohol and suicide, according to researchers, with social isolation, poverty and addiction laying the groundwork.
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