LOUISE WILLIAMS / SCIENCE PHOTO LIBRARY LOUISE WILLIAMS / SCIENCE PHOTO LIBRARY
Illustration of depression. Depression combines feelings of sadness, hopelessness, pessimism with a consequent general loss of interest in life. Depression may be triggered by particular events such as the loss of a close relative or friend or an unsuccessful love story. Sometimes depression may occur without any apparent cause and may be the symptom of a wide range of psychiatric illnesses.
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