I guess we will never know, since my son is not allowed to take the sandwich to school.

However cruel this may sound to you, if it were my son who had the peanut allergy that severe, I'd think the responsible thing to do would be to limit his exposure to an environment that depends on the other 40 toddlers in the room not having a peanut butter sandwich for breakfast.

And were you the kind of guy to not vaccinate your own kid, I'd hope you'd feel pretty terrible if he killed another kid or their elderly or sick relatives with Pertussis.