Plaque Reduction Neutralization Test (IMAGE) Charité - Universitätsmedizin Berlin Caption Evaluation of a 'plaque reduction neutralization test'. Using blood samples from COVID-19 patients, this test detects the antibodies which neutralize the SARS-CoV-2 virus, i.e. stop the virus infecting cells. These tests must be performed in laboratories meeting biosafety level 3 criteria, such as Charité's Institute of Virology and the Bundeswehr Institute of Microbiology. Credit Photo: Müller/Charité Usage Restrictions The image may only be used with appropriate credit. 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.