Seven partner institutions cooperate in the DZIF at the Hannover - Braunschweig site. The research areas Infections of the Immunocompromised Host and Novel Antibiotics are coordinated from here. The scientists are involved in the establishment of a national transplant cohort and make a significant contribution with research projects on new therapies and diagnostic methods for infections with various herpes and hepatitis viruses as well as vaccine development against the hepatitis C virus. New approaches for effective treatment and control of resistant bacteria are also being pursued, and various molecular targets for active agents are being investigated. An important role is played by the identification and development of drug candidates with potential as antibiotics.