Natural progression of the complete blood count in patients with spinal cord injury who were enrolled in the Sygen trial. Three different patterns of progression were observed. First, the blood markers, such as thrombocytes, remained constant and within the range of able-bodied people. Second, blood markers were pathological immediately after the trauma, but recovered over the course of a year and reached the normal range. Erythrocytes, hemoglobin, and leucocytes are characterized by such a course. Third, values were initially within the normal range, but as a function of time they became pathological when compared with those of able-bodied people. Hematocrit is one such example (not shown here). For clinical decision making as well as the design and implementation of clinical trials, it is of utmost importance to know the temporal progression of these blood markers. For further exploration of the data, please refer to the web application Haemosurveillance (https://jutzelec.shinyapps.io/Haemosurveillance/).