There is a thread on this already in the PLS section, but I thought this would get more traffic here. Anyway, what is your feeling on the flu vaccine as a contributor to ALS onset or worsening of symptoms? In the other thread,most felt that it was preferable to have the vaccine. A woman, who lived in the area, died of the flu and that prompted me to have the shot. Unfortunately, the vaccine I had contained mercury. I called the nurse and informed her of this situation. She will look into getting a mercury-free vaccine next year.