epidemic, vaccination, travel medicine, infectious diseases department, bacteriological, virological, serological examinations, laboratory diagnosis, epidemic process, pandemic, endemic, Lyme borreliosis, influenza, rabies, pathogenesis, infectious diseases diagnostics, general therapy, parenteral nutrition, antimicrobial therapy, microbial resistance, empirical antibiotic therapy, antibiotic combinations, side effects, prophylaxis, chronic fatigue syndrom, fever of unknown origin, bacteremia, sepsis, septic shock, respiratory tract diseases