Felipe Cava, Umeå University (IMAGE) Umea University Caption This is infection biologist Felipe Cava who led the study at the Laboratory for Molecular Infection Medicine Sweden and the Department of Molecular Biology at Umeå University. Credit Mattias Pettersson, Umeå University Usage Restrictions This photo may only be used in contexts related to this news release. 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.