Little Bugs that Cause Big Allergies (IMAGE) University of Iowa Caption Dust mites are tiny and ubiquitous, but they cause big allergic reactions for many people. University of Iowa researchers have created a vaccine that may provide relief to dust-mite allergies. Credit Illustration by Austin Smoldt-Sáenz, 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.