Why are people who recover from major depression never really out of the woods?

“(A) new study, published in the November issue of the American Journal of Psychiatry, has identified an apparent ‘depression trait marker’ in the brain that may explain why recovered patients remain vulnerable to another depressive episode. The finding could have important implications for developing more targeted treatments that help patients stay well longer AND identifying family members at risk before they have even experienced a major depression.” EurekAlert!