Gwynne Mhuireach on her study (AUDIO) University of Oregon Your browser does not support the audio element. Caption Gwynne Mhuireach, a doctoral student at the University of Oregon, discusses her effort to understand what microbes in the air are good for people who live in growing cities. Credit University of Oregon 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.