LOS ANGELES, Feb. 1 (UPI) -- Improvements in air quality over the past decade have resulted in fewer cases of ear infections in children, U.S. researchers suggest.
Study co-author Dr. Nina Shapiro of Mattel Children's Hospital University of California, Los Angeles, and of the David Geffen School of Medicine at UCLA and colleagues reviewed National Health Interview Survey data for 120,060 children between the years of 1997-2006.