https://www.healio.com/news/infectious-disease/20201209/uk-a...
here it says that UK authorities advise that people with a history of allergic reactions may not get the mRNA based vaccine, as they may get an anaphylactic event. Now wikipedia says that this is a potentially serious condition https://en.wikipedia.org/wiki/Anaphylaxis
Now I am confused, https://www.aafa.org/allergy-facts/ says that some 50 million people in the US suffer from some kind of allergies, does that imply that 15% of the population can't get the mRNA vaccine? Now would that figure have any implications on the effectiveness of vaccination? Should people with allergies get a different kind of vaccine? Many questions remain.
I don't see a public discussion of these issues.