Image of SARS-CoV-2 (IMAGE) Johns Hopkins Medicine Caption A transmission electron microscope image of SARS-CoV-2, the virus that causes COVID-19, next to a model of the virus particle. A new long-term study by Johns Hopkins Medicine reaffirms the benefits of COVID-19 vaccination for organ transplant recipients to reduce the risk of disease severity or complications when breakthrough cases occur in this vulnerable population. Credit Both the photomicrograph and model are courtesy of the National Institute of Allergy and Infectious Diseases, National Institutes of Health Usage Restrictions none 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.