STEFA N PÖHLMANN is Professor for Infection Biology and Head of the Infection Biology Unit of the German Primate Center. His research is focused on virus host cell interactions, particularly on the molecular processes underlying host cell entry of human immunodeficiency virus and emerging viruses. Stefan Pöhlmann received his academic degrees (Dr. rer. nat., venia legendi) from the Friedrich‑Alexander‑University Erlangen‑Nurnberg. Before his appointment at the German Primate Center, he worked as a postdoctoral fellow at the University of Pennsylvania, as a junior research group leader at the Friedrich‑Alexander‑University Erlangen‑Nurnberg and as an assistant professor at Hannover Medical School. He serves on the editorial board of the Journal of Virology and Virology and serves as academic editor for PLoS ONE.GRAHAM SIMMONS is an Associate Investigator at Blood Systems Research Institute and Associate Professor in the Department of Laboratory Medicine at the University of California, San Francisco. He is interested in many aspects of viral entry, particularly for blood transfusion transmissible agents and other emerging and re‑emerging viruses that may be a threat to the blood supply. Graham Simmons received his doctoral training from the Institute of Cancer Research in London prior to performing an EMBO‑sponsored postdoctoral fellowship at the University of Pennsylvania.

• Attachment Factors.- Picornavirus Entry.- Reovirus Receptors, Cell Entry, and Proapoptotic Signaling.- Entry of Influenza Virus.- Filovirus Entry.- Paramyxovirus Entry.- Cellular entry of retroviruses.- Class II Fusion Proteins.- Entry of Rhabdoviruses into Animal Cells.- Entry of Herpesviruses into Cells: The Enigma Variations.