Immunoglobulin M (IgM) (IMAGE) Texas Biomedical Research Institute Caption The IgM antibody has multiple arms to catch the virus, making it more efficient in clumping up the virus and keeping it from passing through the mucosal barrier and entering the rest of the body. Credit Chris Wager Usage Restrictions Please credit graphic artwork to Chris Wager 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.