I have been told by allergists that it is impossible for a human to be allergic to another human. Is this true and if so why? I've seen old studies (done in the 1940s) on human dander and atopic dermititis, but nothing concerning typical
reactions such as sneezing, runny nose, etc.... Understandably, enviromental factors are usually pointed to as the source. If these can be ruled out over time (20+ years), what could be the cause of "allergic type" reactions to another person? Please Help!