Major depression is often associated or correlated with immune function dysregulation,[1][2][3][4][5][6] and the two are thought to share similar physiological pathways and risk factors.[1][7] Primarily seen through increased inflammation, this relationship is bidirectional with depression often resulting in increased immune response and illness resulting in prolonged sadness and lack of activity.[2][8] This association is seen both long-term and short-term, with the presence of one often being accompanied by the other and both inflammation and depression often being co-morbid with other conditions.[9][10][11][12]
Explanations for this relationship have come from both medical and evolutionary approaches, with disagreements stemming primarily about whether the connection is functional and why depression and inflammation share similar physiological pathways.[13][14][15]
^ abCite error: The named reference :2 was invoked but never defined (see the help page).
^ abCite error: The named reference :0 was invoked but never defined (see the help page).
^Cite error: The named reference :27 was invoked but never defined (see the help page).