“…In summary, we do need an immunoscope, i.e., a way to monitor quantitatively all key aspects of the immune response overtime, in ICU, because the host immune response (1) is clearly responsible for the pathophysiology of sepsis and septic shock, (2) is highly dynamic, (3) but also heterogeneous among patients, and (4) its complexity (number of players, and complex interplay of immune functions) prevent the use of a single biomarker. The ability to assess the immune status of critically ill patients will facilitate the adoption of adaptive clinical trials, allowing enrichment and stratification of patients who will be helped most by specific management approaches and treatments [22]. It is quite disappointing to have reached such detailed knowledge about the role of the immune system in critical illness, without having translated that into clinical practice.…”