It's our new health obsession. I don't share the tone of slight condescension in this Observer piece from London. Exercise, diet and sleep are the three essential parts of maintaining good health and a good immune system. Some of us have to be a little more vigilant on this front than others. But everyone can benefit. In D.C., the sleeplessness is endemic. It doesn't help good government.
We want to hear what you think about this article. Submit a letter to the editor or write to firstname.lastname@example.org.