The impact of acquired immunodeficiency in a patient with b-cell chronic lymphocytic leukemia on the course of coronavirus disease (COVID-19): a case report.

Chronic lymphocytic leukemia (CLL) is a lymphoproliferative disorder that affects the bone marrow, lymph nodes, and spleen, and is associated with certain complications. One of the complications of CLL is acquired immunodeficiency, leading to a predisposition for prolonged respiratory viral and bacterial infections. This publication presents a clinical case of a prolonged and severe course of COVID-19 in a patient with CLL, who was successfully treated with immunoglobulin replacement therapy.