Osama Ahmed Hassan, Umea University (IMAGE) Umea University Caption Osama Ahmed Hassan is an infectious disease epidemiologist from Sudan who has been studying emerging zoonotic diseases such as Rift Valley fever for over six years in east Africa and the Arabian Peninsula. Credit Dicko Alhusseini Usage Restrictions None 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.