Baltimore City Health Department

Today in New York, Democratic presidential candidate Hillary Clinton made reference to an article saying that life expectancies can drop by as much as 20 years in the span of just a few miles.

Here's the map showing what she was talking about. From this view, it's even more stark than that.

Created by the Baltimore City Health Department, it shows the different life expectancies in the 55 neighborhoods that make up Baltimore.

As you can see, there are seven instances of neighborhoods, in bright green, where life expectancies rise as high as 85.3 years, sitting adjacent to bright red ones, where expectancies can drop to as low as 66 years.

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This setup is not unique to Baltimore. In 2013, the Robert Wood Johnson Foundation mapped out neighborhood life expectancies in five other cities, and found that New Orleans has the highest disparity, at 25 years.

What such maps really show are income disparities.

"[There are] many cities around the country where life expectancy is comparable to developing countries," Dr. Steve Woolf, a physician and director of the Virginia Commonwealth University's Center on Society and Health Woolf, told ABC News. "The New Orleans example is very dramatic but it's happening all across the country."

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Rob covers business, economics and the environment for Fusion. He previously worked at Business Insider. He grew up in Chicago.