Depression 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. Depression affects an estimated one in 15 adults (6.7%) in any given year.
With proper diagnosis and treatment, the vast majority of people with depression will overcome it
Source: American Psychiatric Association https://www.psychiatry.org/patients-families/depression/what-is-depression