In this 2009 photo, Hanna Carter, of Roanoke, Va., takes a dosage of peanut protein at the Duke South Clinic at Duke University in Durham, N.C., as part of her treatment for peanut allergies. (AP Photo/Gerry Broome)
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In this 2009 photo, Hanna Carter, of Roanoke, Va., takes a dosage of peanut protein at the Duke South Clinic at Duke University in Durham, N.C., as part of her treatment for peanut allergies. (AP Photo/Gerry Broome)
