The Marie Sklodowska-Curie project CORVOS is funded as an Innovative Training Network (ITN) – European Joint Doctorate (EJD). To keep it simple, one can say that CORVOS is an European-wide doctoral programme. Its focus lies on education of early stage researchers (ESRs) in the field of complement in opportunistic infections. This interdisciplinary doctoral programme is supported by 10 European universities, 2 research institutes, 3 biomedical companies and 3 hospitals, as explained here.