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What is depression?

Susan Vachon

Medically reviewed by Susan Vachon, PA-C on January 10, 2022

Depression is a persistent state of low mood and aversion to activity that can affect a person’s thoughts, behavior, feelings and sense of well-being. It is an emotional condition which needs attention and proper treatment. Depression affects millions of people all over the world and has become one of today’s leading causes of disability and work absence.

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