Self-Healing Gel (IMAGE) McMaster University Caption McMaster engineers specializing in infectious diseases have created a bacteria-killing gel composed entirely of friendly viruses. The gel can heal itself when cut. Credit JD Howell, McMaster University 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.