The United States is populated almost entirely by immigrants and their descendants. It also has the highest rate of bipolar disorder: 4.4 percent, which is about twice the rate of the rest of the world. Are the two related? Japan, which has almost no immigration, has a bipolar rate of 0.7 percent, one of the lowest in the world.
The United States is populated almost entirely by immigrants and their descendants. It also has the highest rate of bipolar disorder: 4.4 percent, which is about twice the rate of the rest of the world. Are the two related? Japan, which has almost no immigration,has a bipolar rate of 0.7 percent, one of the lowest in the world.
