@JS87 If you were allergic to mRNA you wouldn't be alive as it is vital for every single cell in your body (it is the intermediary between your DNA gene sequences and the proteins that the gene codes for) so I don't think that you need to worry about the BNT162b2 RNA ingredient.
Agreed, we have millions of mRNAs in our body at any time, it's how proteins are made. Incredibly clever system! The BNT162b2 is what they've called the mRNA fragment that codes for the spike protein, that's all. What it isn't is 'a bit of the virus' (someone else's comment further up). It is not. There is NO viral genome in the vaccine. People shouldn't be concerned about that.
The one thing that should be noted is that there's PEG in there - polyethylene glycol (ALC-0159 = 2[(polyethylene glycol)-2000]-N,N-ditetradecylacetamide). This will be part of the lipid that protects the fragile mRNA. PEG isn't particularly nice and unfortunately is in a lot of foodstuffs and cosmetics, etc, so a lot of people have anti-PEG antibodies. But you could argue if you're not sensitive to it at this point, you'll probably be OK with the vaccine.
@trulydelicious I hadn't heard of the Valneva vaccine! Sounds like it's behind the front runners. Yes adjuvants are potentially problematic to the immune system e.g. aluminium salts (alum), squalene. Frequently it's the older 65+ section of the population that gets them in vaccines as our immune systems are allegedly 'weaker'.
So this Dynavax CpG 1018 adjuvant, I had a look around for any further info. It appears it's been developed to replace alum and is used in a Hep B vaccine. It acts to stimulate the toll like receptor 9 (TLR9)
www.dynavax.com/science/cpg-1018/
Thing is, TLR9 is also involved in the autoimmune response. There's active research into synthetic TLR9 agonists and antagonists that help regulate autoimmune inflammation. Not sure I would want that injected into me. This study shows that levels of TLR9 (along with some other TLRs) is raised in thyroid autoimmune patients.
www.ncbi.nlm.nih.gov/pmc/articles/PMC5145898/
Having Hashimoto's, that's one vaccine I wouldn't touch with a barge pole!