We study molecular and medical aspects of various RNA viruses, especially hepatitis, hepaci and coronaviruses. One focus of our work is the study of viral transmission. To this end, we are developing new test systems to investigate the stability of viruses to environmental factors and disinfectants and to develop more efficient prevention strategies. to develop more efficient prevention strategies. In addition, we are investigating the cellular processes that control the virus replication in order to find new targets for antiviral agents in the long term. to find antiviral agents. For this purpose, we use a broad spectrum of methods from virology, infectious medicine, bioinformatics as well as cell and molecular biology.