the reason eggs are listed is because the vaccine is made and produced in a chricken embryo. it is infected with H1N1 and then the antibodies produced are used so it has quite a high egg content.

it is just one precaution listed, as the implications if someone had an allergic reaction cant then come back and say i wasnt informed.

when someone has a reaction it get reported and it is all reported what we suspect the allergic reagent was eg the eggs or a sulphuric product or unknown cause..