Dooknob (IMAGE) Ruhr-University Bochum Caption The material a surface is made of affects how long viruses and bacteria can remain contagious on it. Credit © RUB, Marquard Usage Restrictions The image may only be used in the context of the press release "Copper is effective against Sars-Cov-2 on surfaces – silver is not" published by RUB, 5.5.2022. License Original 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.