It is good that they are being so careful with you Nm80 xx. Better to have the experts around in case there is a serious attack xx
My husband had an allergic response to his first chemo - but not a full anaphylactic response (we had epipens everywhere!) and they backed off the chemo for an hour or so & monitored him before starting it again. He was fine after that first one.
BUT, having said that ... I have 2 friends who have lost a close family member (brother and husband) to a bad immunotherapy 'reaction/allergy' after just 1 or 2 doses .... and that is NOT GOOD ENOUGH.
So if it was ever offered to ME - I would demand a 25% solution first up, then maybe a 50% for the 2nd one before gradually going up to the 100% solution - exactly so I could 'test it' first. They just don't know WHO is going to have a BAD reaction to any of these treatments, sadly.
Take care & all the best for your continuing treatment xx