Microbes Help Children Breathe Easily? Bacteria and Fungi May Offer Protection Against Asthma, Study Suggests
http://www.sciencedaily.com/releases/2011/02/110223170831.htm
http://www.sciencedaily.com/releases/2011/02/110223170831.htm
"Children who grow up on farms are less likely to suffer from asthma than other rural children."