Released: 20-Oct-2014 2:05 PM EDT 

“Inflammation is the immune system’s response to infection or disease, and has long been linked to stress. Previous studies have found depression and anxiety to be associated with elevated blood levels of inflammatory molecules and white blood cells after a confirmed diagnosis, but it has been unclear whether greater inflammation was present prior to the onset of disease or whether it is functionally related to depression symptomology.”

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via Stress-Related Inflammation May Increase Risk for Depression.