How do bacteria and viruses cause diseases? How does our immune system defend itself against them? And what must active substances be able to do to fight dangerous infections? The Helmholtz Centre for Infection Research - HZI for short - is looking for answers to these questions. How this research works, how the results are used in medicine and who the people are who do the research here. You can listen to it here: At InFact - the podcast of the Helmholtz Centre for Infection Research.