There may be a farm remedy for asthma. Doctors say as many as 10% of schoolchildren have asthma and many believe it’s because today’s children are just too clean. It’s the hygiene hypothesis. Scientists now say they may have found the magic potion to prevent asthma in children: microbes from farm animals, carried into the home in dust.

This is not some snake oil from Dr. Oz. Research published in the New England Journal of Medicine raises the possibility of “developing a spray” for children who do not have regular contact with cows and horses. Could that be “essence of barnyard?” Dr. Talal Chatila, an immunologist at Harvard Medical School, says, "It is not far-fetched to start thinking of how one could harness those bacteria for a therapeutic intervention."

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