Ouyang Y, et al. - Via obtaining data regarding autumnal grass pollens and air pollutants measured from local governmental agencies, researchers explored the connections among airborne grass pollen, air pollutants and allergic diseases, in order to identify their impacts on patients with grass pollen allergies in Beijing, China, during the period from 2013 to 2016. From the Department of Allergy in Beijing Tongren Hospital, patient data regarding specific immunoglobulin E (IgE) analyses from 2013 to 2016 were obtained. According to correlation analysis, the daily number of grass pollen-positive patients was significantly linked to the peak period of grass pollens, as well as pollutants SO₂ and oxides of nitrogen. Grass pollens had a significant impact on the morbidity of allergic disease. Allergic disease and grass pollen have been affected by air pollutants. It was noted that particulate matter 2.5 µm in diameter was negatively linked to Artemisia and Chenopodium pollens. Public health and clinical approaches are therefore needed to anticipate and reduce pollen and pollutant allergic disease morbidity.