I have also heard that if you have had the flu shot for more than 5 years straight, you will be more likely to develop Alzheimer's. I have received the shot for at least 37 years straight. Does anyone know if this is true? I don't have Alzheimer's in my Family. But I take care of my husband who is in stage 6 of the disease. It is scaring me now to think that I might be the next one to get it!