According to HealthLink BC, depression is an illness that causes you to feel sad, to lose interest in activities that you’ve always enjoyed, to withdraw from others, and to have little energy. It’s different from normal feelings of sadness, grief, or low energy. Depression can also cause people to feel hopeless about the future and even to think about suicide. The World Health Organization (WHO) states that depression is the most common illness worldwide and the leading cause of disability. They estimate that 350 million people are affected by depression, globally. According to the Centers for Disease Control and Prevention (CDC), 7.6 percent of people over the age of 12 have depression in any 2-week period. This is substantial and shows the scale of the issue.