The Lancet Haematology is an exclusively online journal dedicated to publishing original research that advocates change in, or illuminates, haematological clinical practice, including, but not limited to, the subjects of: haematology-oncology, red and white blood cell disorders, platelet disorders, stem cell transplantation and induced pluripotent stem cells, and transfusion medicine. All original research judged eligible for consideration by the journal’s editors will be peer-reviewed within 72 h and, if accepted, published online within 8 weeks from submission. The journal will also publish relevant commentary and correspondence.