Prototype (IMAGE) Ecole Polytechnique Fédérale de Lausanne Caption A prototype of a personal protection mask with a titanate filter, which shows efficient to kill bacteria and viruses. Credit Courtesy of Swoxid SA / Endre Horvath 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.