[Sepsis: new insights, new definition].

- Incidence of sepsis is increasing, partly due to an ageing population, increased use of immunosuppressants, and antibiotic resistance. Sepsis survival has improved substantially, in part because of continuously improving intensive care and implementation of evidence-based guidelines.- Sepsis is defined as 'life-threatening organ dysfunction due to a dysregulated host response to infection'. The Sequential Organ Failure Assessment (SOFA) score can be used to estimate organ dysfunction severity.- In this article, we discuss the new sepsis definitions - including reactions to these definitions, an overview of current insights in sepsis pathogenesis, and the new treatment guidelines.- Prevention of sepsis, faster pathogen detection, new lung and kidney function-preserving treatment strategies, further individualisation of patient care and attention to long-term consequences of sepsis will determine the research agenda for the coming years.