I got my first-ever flu shot in October 2004 at the age of 42. I came down with shingles within a few days, on the ride side of my head.
I had blisters on my forehead, all over the right side of the roof of my mouth, and huge blisters around my eye, along my cheekbone, nose, and mouth -- basically all along the three branches of the trigeminal nerve. Fortunately my eye was not damaged.
Shingles is painful and it sucks, but it's nothing compared to the post-herpetic neuralgia. It has been nearly 10 years now, and I suffer with it every day. I tried neurontin, morphine, and methadone in a series of unsuccessful attempts to manage the pain.
I am now on Effexor XR, which helps ease the constant nagging itch and burning, but it can't touch the deeper pain that affects the entire right side of my face. It is especially bad when it gets in my upper teeth; it's as if I'm having my teeth drilled with no novacaine. x__X
As many others had said, no doctor I have seen will admit that the flu shot had anything to do with the onset of shingles, but I know it did. I was 100% healthy, rarely coming down with so much as a cold. But because the company for which I work sent people around to every cube, bugging people until they got a free flu shot, against my better judgment I relented and it irreparably damaged my life.
Vaccines, in the aggregate, are a good thing for society and safe for most people. But beware: for some of us there are dangers lurking in those injections. If I had been unfortunate enough to get the flu that season I'd have been over it in 7-10 days. Instead I ended up with chronic, incurable pain.