//A few people have had an allergic reaction to the vaccine so we are now being told people who have allergic reactions to some medicines ...//
Naomi."Why have they only now discovered that some may have an allergic reaction to it? I was under the impression it had been thoroughly tested. Did none of the guinea pigs have an allergic reaction?"
Its been known since before the first clinical (ie non test) vaccinations were done.
"It’s very rare for anyone to have a serious reaction to the vaccine (anaphylaxis). If this does happen, it usually happens within minutes.
Staff giving the vaccine are trained to deal with allergic reactions and treat them immediately."
https://www.nhs.uk/conditions/coronavirus-covid-19/coronavirus-vaccination/coronavirus-vaccine/
people who get the vaccination are asked to stay on the premises for 15 minutes after being vaccinated in case of anaphylaxis.
the "don't have/swallow/use this if you are allergic to any of the ingredients" is pretty much standard on all medication information leaflets.