CoagulatedVirus (IMAGE) Texas A&M University Caption The water treatment step called coagulation causes enveloped viruses that are freely suspended in water (left) to aggregate and form clumps (right) that can then be easily removed. Credit Dr. Shankar Chellam/Texas A&M Engineering 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.