This may seem ridiculous, considering all the hype about vaccines and autism. I am not a conspiracy theorist, but I am wondering if there could be any relation between the flu vaccine and POIS. The last flu vaccine I had was nearly 4 years ago. In addition I had a tetanus vaccine about three or four years ago as well. This was around the time when problems worsened. Could the flu vaccine have accidently triggered some long lasting auto-immune response? Could the solution be to get another vaccine? I know I am panicking, but I would like to see if any other have had similar thoughts. btw, I don't necessarily believe in the connection between vaccines and autism. I am still on the fence regarding that one.