No. You clueless blithering idiots don't get it.
No one whines in the news media "but think of the stupid kid with an egg allergy". It's always the kid that shouldn't even been anywhere near a school.
Some people are just in danger just by being exposed to lots of children and their germs. This kind of "medical excuse" is bogus. They shouldn't be in school to begin with. It doesn't matter if the whole rest of the school tries to cater to their condition or not.
As far as "allergies" go, that's a real judgement call. However, most alergies even aren't nearly as severe as diseases we vaccinate children for.
This is really one of those many situations where our own wealth puts us at a disadvantage. We're so used to not seeing some of these diseases that we are really out of touch with how bad they really are. The whole lot of us are terribly sheltered.