Researchers at the University of Iowa have developed a vaccine that can combat dust-mite allergies by naturally switching the body’s immune response. In animal tests, the nano-sized vaccine package lowered lung inflammation by 83 percent despite repeated exposure to the allergens, according to the paper published in the American Association of Pharmaceutical Scientists Journal. The researchers included College of Public Health investigators Andrea Adamcakova-Dodd, Xuefang Jing, and Peter Thorne.