Asma Tahir (Environmental and Occupational Health) and Eric Matesen (CCSD/UNLV Pollen Monitoring Program) presented a poster titled, "Annual Comparison of Grass, Tree, and Weed Pollen in Las Vegas, Nevada, from 2019-2021," during the annual conference of the American Academy of Allergy, Asthma & Immunology on Feb. 24-27 in San Antonio, Texas.