An allergist I spoke to said that the recent explosive increase in child peanut allergies has them examining the possibility that some recent change in the ingr

An allergist I spoke to said that the recent explosive increase in child peanut allergies has them examining the possibility that some recent change in the ingredients in some medication, or possibly a food, given to pregnant moms or babies or toddlers is somehow tricking the immune system into an extreme reaction to peanut proteins. I realize that my recollection here amounts to an uninformed rumor, but my point is that there may be some, possibly very minor, mystery ingredient that has recently been added or substituted for something else in some food or medication, that just happens to have the right chemical structure to trigger a crazy mal-adaptation in a new immune system. If so, identifying it might require years of detective work.