Has anyone, ANYONE, heard of this? I feel like I may have made it up (consultant allergist's never heard of it, staff at the Anaphylaxis Campaign never heard of it, not many references on the internet). I'm sure I read an article or saw a program about this - a man with severe allergies, interested in why some populations around the word do not suffer, hypothesised it may have been their infection with a certain kind of parasitic worm that regulates the abnormal immune response involved in allergy, infected himself and his allergies ceased while he was infected. Did I dream this stuff up? Seems a bit of a leap, as I normally dream about Leonardo DiCaprio bringing me Lindt...