I don't entirely understand the question either. Unfortunately for most of us here Depression is a chronic illness. For some they had an episode and got better and it did not return. ...no surprise there ... Sure, when I am doing well with the depression under control and I get influenza I can get symptoms of depression ... no surprise there. ... Re the gut bacteria its not a new idea. I started reading about that from about 2008. It has been discussed/linked to many problems including obesity. Gut bacteria plays some kind of role in health including mental health ... no real surprise there either ...

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