This is an interesting debate. I will not be getting the shot because last year I reacted badly to the flu shot, even though I fought to get it from a pediatrician and finally managed to do so. (in our town, "mercury" is in the adult shots, not in the pediatric shots). My son wanted me to get the shot, so I called a pediatrician, Dr.Krohn, who is knowledgeable about Porphyria, my other disease. Even though she ordinarily refuses to see adults unless they are attached to her child patients, she was glad to see me and would do so now. But I got quite sick from the shot and was in physical and emotional misery for some time--not months, this time, but at least weeks.
Then, someone showed me that the flu shots in this country vary widely as to what adjuvants they have in them. Even if, as Erica says, the ingredients are not shown on the labels, this person had a list of adjuvants in various brands--quite a few different brands. And each one had several additives which I would react too.
Of course, squalene was one of them. I believe i have reacted badly to Propylene Glycol. And there were various other things I couldn't guess about, but would rather not have.
Don't you, Erika, and others here, react to mercury, which is in the adult shots?

In years past, over five years ago at least, I could take a flu shot if it did not have mercury in it, but not any more. I do not know whether it is that I've aged or the shots are now formulated with more adjuvants that I cannot handle well.

My basic reaction is to have muscle pain, cognition decline (quite noticeable, not just a "mood") and spastic reactions. The cognitive dysfunction is the most disturbing, as I need to keep a clear mind in order to live with several diseases which take monitoring and handling by myself.
I am also distressed, Erica, about the problem you set forth, the lack of clear information on this.
I will have to isolate myself within the house if worse comes to worse. I cannot go through that reaction to the flu shot again. I don't have the courage to make my mind go flaccid and try to cope anyway.