JOURNAL OF CLINICAL IMMUNOLOGY, cilt.39, sa.3, ss.316-323, 2019 (SCI-Expanded)
Severe combined immunodeficiency (SCID) is the most serious PID, characterized by T cell lymphopenia and lack of antigen-specific T cell and B cell immune responses, inevitably leading to death within the first year of life if hematopoietic stem cell transplantation (HSCT) is not performed.