Can be contracted by passing within a few feet of Andy Graham, the poor kid, or by eating custard at school dinners. (Only Andy Graham would eat the stuff, and we assumed it was because he was so poor and didn't have food at home). The only cure was to be wrestled to the ground by a group of kids screaming "NURSE!" and pretending to spray you with aerosol. Sometimes, if the afflicted person was unpopular, nobody would attempt to cure them for fear of contamination themselves. Thus, sat at the back of the class with no mates, when the teacher asked what the matter was, the often tearful child would mutter "I've got the Andy Graham Disease sir".