I have asthma and am SOOOO grateful for the flu vaccine! It really minimizes symptoms if you do get the vile flu. In the past if I get a common cold it's scary because quickly it turns to bronchitis, which as you know, with asthma is no party. I get the flu shot every single year and have not had the flu since I began taking it. Nor have I experienced any side effects whatsoever. I used to be anxious of getting it until one year in my office EVERYONE but one woman had the flu (including me)... she had gotten the shot and was pleased not to be sick. I was sold. Terrified though, as that was the first time I'd ever had the shot. No side effects, no flu. Hope the same for you!