Jessica Kramer.jpg (IMAGE) University of Utah Caption University of Utah biomedical engineering assistant professor Jessica Kramer has learned that mucins, a protein in human mucus, acts as a barrier that prevents viruses like Covid-19 from spreading through contaminated surfaces. Her research reveals why the coronavirus largely does not spread by touching surfaces like countertops or objects. Credit Dan Hixson/University of Utah College of Engineering Usage Restrictions No restrictions. License Public Domain 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.