As a concidence, I have one of these bugs as we speak. It lives in me. Never going to completely get rid of it. My problem is I work too hard, get weak, and when it starts to cool off outside I come down with it. I come down with it every year, for the last 5, about this time of the year. It will last for 4-6 weeks. I feel terrible. Still work too hard. Not enough sleep. Not eating well, or at all.
So if my posts get crazier, or dumber, it’s just the delirium.
Since your illness is a seasonal thing, have you ever been tested for allergies? Allergies can make you feel awful and you might mistake it for a virus.