Alpha/beta T-Cell Lymphopenia with Gamma/delta T-Cell Expansion, Severe Cytomegalovirus Infection, and Autoimmunity, also known as alpha/beta t-cell lymphopenia, with gamma/delta t-cell expansion, severe cytomegalovirus infection and autoimmunity, is related to combined immunodeficiency due to partial rag1 deficiency. An important gene associated with Alpha/beta T-Cell Lymphopenia with Gamma/delta T-Cell Expansion, Severe Cytomegalovirus Infection, and Autoimmunity is RAG1 (Recombination Activating 1). The drugs Ledipasvir and Sofosbuvir have been mentioned in the context of this disorder. Affiliated tissues include t cells and bone marrow.