In April 2013, a medical journal called Annals of Allergy, Asthma & Immunology published an amazing new study regarding asthma and allergies. Based on a study of nearly 2,600 people from the U.S. National Health and Nutrition Examination Survey, researchers found that 75 percent of adults aged 20 to 40 with asthma, and 65 percent of adults 55 and older with asthma, have at least one allergy.