I voted "other," so I guess I need to explain. I haven't gotten the flu shot this year and don't intend to. I'm not sure I've ever gotten a flu shot. About 15 years ago, my doctor wanted me to get a flu shot because I'd just gotten over a lingering respiratory infection that resisted antibiotics. I don't remember, but he may have given me a flu shot. If so, I don't remember having an adverse reaction.
Possibly in the same year (I had the same doctor), I was offered a Hepatitis B vaccine at my place of employment, since I worked in healthcare. Before giving me the injection, the nurse gave me a brochure with information about the vaccine. It contained thimerosal --- a form of mercury that was once an ingredient in most contact lens solutions. When I started wearing contacts, my eyes itched terribly and I didn't think I could wear contacts until I discovered I was allergic to the thimerosal in the solutions and began buying thimerosal-free solutions. I mentioned this to the nurse and she advised me to call my doctor. The doctor's office advised me not to get the vaccine because they didn't know what effect it would have.
Years later, I had the opportunity to get a flu vaccine at another place of employment. Again, I was given a brochure about the vaccine and it contained thimerosal. I mentioned my allergy to thimerosal to the nurses giving the injection and they again advised me not to get the vaccine.
Until I was in high school, I was often sick with stomach viruses and ear infections, missing quite a bit of school. I remember getting the Hong Kong Flu, which was pretty severe, and I did get the Russian Flu when I was in high school. When I worked in healthcare, I mostly had upper respiratory infections. I did have a pretty severe virus with a high fever about 3 years ago, and another one 2 years ago. Then, I had a bad cold last month which is unusual for me. I think I was susceptible because I didn't work for 1½ years and so wasn't exposed to many germs. Now, I work in a place with a lot of employees and we work in close proximity to one another.
I do try to stay healthy through other means -- by taking probiotics, eating garlic, onions, hot peppers and lots of fruits, vegetables and whole grains.