This Tuesday, March 27, 2012 photo shows eggs at a supermarket in Antwerp, Belgium.
First peanuts, now eggs. Doctors have reversed allergies in some children and teens by giving them tiny daily doses of problem foods, gradually training their immune systems to accept them. Don't try this yourself, though. The researchers say it takes special products, a year or more and close supervision because severe reactions remain a risk. The findings of the study are in the Thursday, July 19, 2012 New England Journal of Medicine. (AP Photo/Virginia Mayo)