Immunodeficiency 48, also known as combined immunodeficiency due to zap70 deficiency, is related to severe combined immunodeficiency, atypical and zap70-related severe combined immunodeficiency, and has symptoms including diarrhea An important gene associated with Immunodeficiency 48 is ZAP70 (Zeta Chain Of T Cell Receptor Associated Protein Kinase 70). Affiliated tissues include t cells and lymph node, and related phenotypes are recurrent bacterial infections and recurrent viral infections