Depression, according to Psychiatry.org, “is a common and serious medical illness that negatively affects how you feel, the way you think and how you act. Fortunately, it is also treatable.”Depression causes feelings of sadness and/or a loss of interest in activities once enjoyed. It can lead to a variety of emotional and physical problems and can decrease a person’s ability to function at work and at home.The website says symptoms, which can vary from mild to severe, include:• Feeling sad or...