Susanne,
In defense of the vaccines, most people who have an adverse reaction to a flu vaccination apparently have mast cell activation disorder (MCAD) aka mast cell activation syndrome (MCAS) which makes their immune system unusually sensitive to the provocation caused by the vaccine. An adverse reaction is a relatively rare occurrence, so the risk is considered to be statistically insignificant. Of course if it happens to one of us then it's certainly not insignificant to us.
A significant percentage of us appear to have mast cell activation disorder, but our level of activity waxes and wanes with histamine exposure and other influences, so that just because we have MCAD does not mean that we will have an adverse reaction to a flu shot. Luck (timing) apparently plays a huge role in determining whether a risk turns into an adverse event.
Personally, I have MCAD and these days I have to watch my histamine intake carefully, even though I take an antihistamine daily. I've never had a flu shot in my life, but if a really deadly strain ever evolved and began to spread, and the drug companies had a vaccine that was actually very effective against it, I would probably opt to get the shot. But my main line of defense would be a supply of high-potency vitamin D (50,000 IU per capsule) in case I needed it. If I thought that I was coming down with a deadly strain, I would take 150,000 IU of vitamin D daily, beginning as soon as I identified/recognized the symptoms, and continue that dose until the symptoms began to resolve. That's a therapeutic dose recommended by the vitamin D council, FWIW.
But in all honesty, based on the studies I've seen, most of the flu vaccines they offer are so ineffective (especially for older people) that if they ever came up with a vaccine that was truly effective against a deadly form of the flu that was rapidly spreading, I would probably faint from the shock.
Logistically, they are very, very unlikely to develop an effective vaccine and get enough doses produced in time to save most of us. My confidence in the CDC is so low that it's almost off the charts, and apparently I'm not the only one who has trouble believing most of the claims made by the CDC these days. They seem to have evolved into a good example of money down a rat hole. But that's just my opinion, based on their performance (or lack of performance)
The bottom line is, I wouldn't be afraid of getting a flu jab (unless I was currently having serious mast cell issues at the time), but I wouldn't have much confidence that it would protect me from the flu, either. Flu viruses can mutate and evolve very quickly — much faster than the drug companies can respond.
Tex