Bioaerosol sample collection (IMAGE) Purdue University Caption Purdue researchers collect bioaerosol samples in fresh produce fields with plastic collection flags like this one. Credit Jiangshan Wang/Purdue University Usage Restrictions News organizations may use this image in reports about the work of Purdue University's Mohit Verma and his collaborators. License Original 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.