The latest issue of scientific American has an article about food allergies in children. Apparently, if you gradually introduce tiny amounts of the foods they are allergic to, in most cases the allergies subside. The amounts used at first are similar to those used in homeopathy.
Years ago, studies were done in Switzerland of children raised on farms versus children from urban areas. Apparently, in Swiss farms, people come in close contact with livestock. Researchers expected to find the children raised on farms would be allergic to animal hairs. They found just the opposite: urban people never exposed to hair were most likely to be allergic to it. - Jed
