1+ hour, 15+ min ago  (687+ words) Front. Immunol. , 15 May 2026 Sec. B Cell Biology Michelle Maria Elbert 1 Hans Christian Reinhardt 2, 5 3. Department of Medical Oncology, University Hospital Essen, West German Cancer Center, Essen, Germany 5. German Cancer Consortium (DKTK), site Essen, Essen, Germany Humoral immunodeficiency is frequently observed in…...