Pls delay the jab if yr gal is allergy to egg. There are some mummies who have shared in the forum that their kids have bad reaction to the jab. There is one mummy that I know of, her son has allergies and asthma, after the jab, his weight gain slowed down and stopped. Not only that, his immune system was greatly weakened and fall sick easily. It depends on whether you want to take the risk or not. I heard some of them became autistic after MMR jab.
Another case is my brother in law's niece who developed eczema after the MMR jab, and she also fall sick easily. Before that, she was a very healthy gal with no skin problems. Hope this helps.