Why do so few Amish kids get asthma? U. of C. scientists take aim at the answer
“We could just say put a cow in everyone’s house and no one would have asthma anymore, but of course, that’s not easy,” Ober said with a chuckle.
http://www.chicagotribune.com/lifestyles/health/ct-amish-dust-asthma-20160804-story.html