CD19 and hematologic disorder: Antibody-based therapy has become a critical part of the treatment landscape in hematologic malignancies in the past few decades and several monoclonal antibodies have been FDA approved that target the lymphoma-specific antigens CD19 (loncastuximab tesirine and tafasitimab-cxix), CD20 (rituximab, obinutuzumab, ofatumumab, ibritumomab tiuxetan), CD30 (brentuximab vedotin), CD52 (alemtuzumab), CD38 (daratumumab, isatuximab), CD79b (polatuzumab vedotin), and CCR4 (mogamulizumab).