Otolaryngologist Sandra Lin uses under-the-tongue drops to treat patients with allergies at Johns Hopkins in Baltimore. Courtesy of Keith Weller/Johns Hopkins Medicine hide caption

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Courtesy of Keith Weller/Johns Hopkins Medicine

The sting of Solenopsis invicta, the red imported fire ant, is well known to many in the Southern United States, but immunotherapy is possible. Courtesy of Alex Wild hide caption

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Courtesy of Alex Wild

Contact with animals and dirty environments may be one reason farm kids are less likely to get allergies, researchers say. iStockphoto.com hide caption

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iStockphoto.com

To Sniff Out Childhood Allergies, Researchers Head To The Farm

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