Nearly 3% of United States adults self-reported having peanut allergy, with 1.8% "having convincing peanut allergy," researchers wrote in the Journal of Allergy and Clinical Immunology.; The new findings should encourage primary care physicians to "assess any patient who states they have a negative reaction to peanut by taking a good history, testing and referring to an allergist," Ruchi Gupta, MD, MPH, director of the Center for Food Allergy and Asthma Research at Northwestern University Feinberg School of Medicine and a coauthor of the study, told Healio Primary Care.