Asher tested positive for egg a while back, but after two food challenges we figured out that he is allergic to raw/semi cooked eggs and not to eggs that have been baked into things. Asher's allergies happen in his intestines, and he has never had local reactions to proteins but he has had them to fruits.
Anyway, when he had his flu shot several months ago it was done in a hospital with a two hour observation with no reaction. So we thought we were safe to continue with vaccines that contain egg perservative and today they gave him two one being the MMR.
Well he reacted today, I'm not sure if it was because he got two or what. He did not need his epipen, but he did get double dosed with bene and was given a nebulizer treatment. We hung out for a couple hours after that before going home and he seems fine now. Has this happened to anyone else?

Re: Talk to me about egg in Vaccines
My understanding is that each batch can be different regarding how much egg is in the vaccine. My allergist prefers to give the flu shot, for example, in her office just in case there is a reaction. My pedi was more than happy to supply the vaccine and have me hand carry it over to the allergist's office for her to administer.
Luckily DS#3 hasn't reacted to a vaccine yet. But it is always a possibility. Glad your LO is ok!
My twins are 5! My baby is 3!
DS#2 - Allergic to Cashew, Pistachio, Kiwi
DS#3 - Allergic to Milk, Egg, Peanut, Tree Nuts and Sesame
Yeah safer is better. We did all previous vaccines in the hospital. Since there was no reaction we thought it was safe to have his pedi administer the shots...not anymore. His next set is in two months and I've already scheduled a two hour administration and observation for them.