WRAIR's COVID-19 Vaccine spike ferritin nanoparticle (SpFN) (IMAGE) The U.S. Military HIV Research Program (MHRP) Caption A vial of spike ferritin nanoparticle (SpFN), WRAIR’s COVID-19 vaccine. Built on a ferritin platform, the vaccine offers a flexible approach to targeting multiple variants of the virus that causes COVID-19 and potentially other coronaviruses as well. Credit U.S. Army photo by Mike Walters/ RELEASED Usage Restrictions Use with credit only 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.