Staal SL, et al. - Considering the World Health Organization recommendation for preventive treatment of school children by providing mass drug administration (MDA) with albendazole to reduce the morbidity and transmission of helminth infections, researchers investigated the prevalence of skin reactivity to allergens before and after albendazole treatment to get an indication of the possible impact of MDA on allergic sensitization. They conducted a study among 150 school children living in an area endemic for soil-transmitted helminths (STH) infections. Findings indicated a reduced prevalence of STH infections but with an increased prevalence of allergic sensitization after 1 year of MDA with albendazole.