Obviously, if you are allergic to eggs you probably would have had a more severe
reaction but people have different reactions to food allergies. Also, perhaps for you the
vaccine seems to give you vomiting as the norm rather than occasionally. The pneumococcal vaccine PCV 13 says you can have vomiting as a side effect as well. I assume the pneumococcal 23 has the same effect. The ingredients are actually different than the flu vaccine there are no similarities.