When most people are __1__, they know the feeling is only ___2___. But there are large number of people who stay sad for a ___3___ time. These people suffer from the common __4__ sickness known as depression. Depression can affect ___5___. Researchers say one out of __6__ persons in the world has the chnace of __7__ a major depression at some time. About __8__ of the depressed patients can be helped with one of several __9__ that have all been found __10__ in treating depression. Doctors say, however, the drugs must be used very __11___. Depression also can be treated __12__ drugs. Some doctors say that moderate __13__ four or five times a week can help treat __14__ depression. For example, running or __15__ rapidly for __16__ minutes __17__ times a week can __18__ mental as well as ___19___ health. The __20__ treatment for depression known as psycho-therapy calls for depressed people to spend an __21__ or more each week __22__ about their condition with __23__ trained to treat mental problems. __24__ is supposed to help depressed people discover new __25__ of thinking and dealing with __26__. Public __27__ is needed to help people better __28__ depression.