(Newser) – As many as three million Americans may be allergic to peanuts, the Huffington Post has reported, with one study suggesting that the number of kids with the allergy doubled between 1997 and 2002. But those who are affected may have a reason to smile: A new study could point the way to a cure for the condition, the Australian Associated Press reports via the Guardian. For a year and a half, 30 kids with the allergy were given peanut protein plus a probiotic every day; another 30 received a placebo, researchers at the Murdoch Childrens Research Institute report....