Sneezing in the Rain (IMAGE) University of Iowa Caption A thunderstorm in Iowa City, May 14, 2020. University of Iowa researchers report tiny pollen particles remain aloft for hours after spring rains, potentially exacerbating allergies. Credit Tim Schoon, University of Iowa Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.