Osama Ahmed Hassan, Umea University (IMAGE) Umea University Caption Osama Ahmed Hassan is an infectious disease epidemiologist from Sudan with a Ph.D. at Umeå University in Sweden. Credit Lena Mustonen 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.