I’m looking for a book that I have only heard a colleague speak very briefly about. He is a teacher and remembers reading a short story within a book of a collection of short stories, when he was studying at Uni, which would have been approx. 1998-2002. But it could have been published much before that. He said the story was about a boy who caught the measles/mumps/chickenpox. He found this other planet/dimension/bubble??? (sorry) where everyone that lived there were basically superhumans. They hadn’t been ill at all. Then this boy entered their “world” and all of these superhumans died because they had been so protected from diseases that they had no immune system, so contact with the measles/mumps/chickenpox killed them. That is all I know. I’m guessing the moral of the story was to do with the benefits/detriments of vaccinations. I have tried searching everywhere with no luck. I searched this site and found one called “Brave New World” but that doesn’t sound like it. I would love to find this book – my colleague said he is so fond of it but doesn’t remember the title or book it was in.

Thank you for your help.