Leaving Segregated Neighborhoods Lowers Blacks' Blood Pressure, NPR, May 15, 2017, available here

Doctors have known for a long time that African-Americans are prone to high blood pressure. And previous research had found people living in segregated places tended to have higher blood pressure.

The new study is the first to follow people over time to see how leaving segregated communities could affect risk of heart disease. This kind of before-and-after study strengthens the observations made in the earlier studies.

...The researchers followed the study subjects for 25 years, when they reached the ages of 43 to 55. Those who moved away from highly segregated neighborhoods to less-segregated neighborhoods and stayed there during that period had significantly lower blood pressure.