Dr. Abdul-Aziz Yakubu is professor and chair of the Mathematics Department of Howard University. He has research interests in the analysis of mathematical models that arise in the diverse fields of ecology, epidemiology and demography. Dr. Yakubu's interdisciplinary research activities include understanding the role of population dynamics on disease dispersal and persistence; the role of preventative treatments on the incidence of infectious diseases; and the role of subpopulation linkages on the stability and resilience of exploited fisheries. In addition, he has research interests in biosurveillance and early disease outbreak detection. Dr. Yakubu is the author of about 60 scientific papers and co-editor of two books. He has a PhD from North Carolina State University.