U.S.-born kids have more allergies, asthma

Kids and teens who are born abroad and immigrate to the United States are about half as likely to have asthma and allergies as those who are born in the U.S., according to a new study. Researchers surveyed the parents of 80,000 children in one of six languages and found that association held even after they took into account where families lived and how often they moved, as well as their race and income. "This is definitely something we see clinically and we're trying to better understand, what is it in our environment that's increasing the risk of allergic disease?" said Dr. Ruchi Gupta, who studies allergies at the Northwestern University Feinberg School of Medicine in Chicago but wasn't involved in the new research. "Food allergies have increased tremendously," she told Reuters Health. "We do see people who come from other countries don't tend to have it, but immigrants who are maybe second generation, they're identical (to U.S.-born people)." It's not obvious what explains that pattern, researchers said. http://www.nlm.nih.gov/medlineplus/news/fullstory_136355.html