I had a nasty virus last year that lasted 2 months. Then I got a lot better, but I keep having relapses, albeit milder. The ENt diagnosed it as Viral Labyrinthitis because I was taking 16 mg of Serc, and I got better.I feel better for two weeks (although not 100%), then I get flu-like symptoms. or colds then my symptoms come back. My head feels like it's full of cotton and I feel like I'm walking on marshmallows. My sinuses often hurt. My question is, is your immune system really compromised as a result of this? I often feel like I'm on the verge of the flu, but then it goes away. The weather seems to affect it. Is this normal?