"U.S. Asthma Rates at All-Time High, CDC Says"
"The proportion of Americans with asthma increased from 7.3% in 2001 to 8.4% in 2010, marking the highest level ever, the U.S. Centers for Disease Control and Prevention said Tuesday. In 2010, an estimated 18.7 million adults and 7 million children had the disease -- one in every 12 Americans."