Travel-related vector-borne virus infections and emerging virus diseases.- Imported vector- and rodent-borne virus infections - an introduction.- WHO program on emerging virus diseases.- Arboviruses as imported disease agents: the need for increased awareness.- Arboviruses causing neurological disorders in the central nervous system.- Sandfly fever viruses in Italy.- Vector-borne viral diseases in Sweden - a short review.- Travel-related vector-borne virus infections in Germany.- Imported tropical virus infections in Germany.- Filovirus infections.- Emerging and reemerging of filoviruses.- Characterization of a new Marburg virus isolated from a 1987 fatal case in Kenya.- Experimental infection of cynomolgus macaques with Ebola-Reston filoviruses from the 1989-1990 U.S. epizootic.- Passive immunization of Ebola virus-infected cynomolgus monkeys with immunoglobulin from hyperimmune horses.- Patients infected with high-hazard viruses: scientific basis for infection control.- Hepatitis viruses and human immunodeficiency virus.- Relative importance of the enterically transmitted human hepatitis viruses type A and E as a cause of foreign travel associated hepatitis.- Significance of imported hepatitis B virus infections.- Genotypes of hepatitis C virus isolates from different parts of the world.- HIV-1 subtype O: epidemiology, pathogenesis, diagnosis, and perspectives of the evolution of HIV.