According to the report, from 2001 to 2009 the prevalence of asthma increased among all demographic groups studied, including men, women, whites, blacks and Hispanics. Black children are most acutely affected: the study found that 17 percent of black children — nearly one in five — had a diagnosis of asthma in 2009, up from 11.4 percent, or about one in nine, in 2001.
While officials at the Centers for Disease Control emphasized that asthma could be controlled if managed effectively, they were at a loss to explain why it had become more widespread even as important triggers like cigarette smoking had become less common.
“We don’t know exactly why the number is going up, but, importantly, we know there are measures individuals with asthma can take to control symptoms,” said Ileana Arias, principal deputy director of the centers. (read more)