A Severe Case of Pneumococcal Pneumonia in a Patient with Chronic Lymphocytic Leukemia Despite Treatment and Vaccination

Abstract Chronic lymphocytic leukemia (CLL) often results in significant immunosuppression, complicating infection management. This case report describes a 74-year-old male with Stage IV CLL and hypogammaglobulinemia who experienced severe Pneumococcal pneumonia despite receiving antibiotics active against pneumococcus, frequent immunoglobulin infusions, and pneumococcal vaccination. This report highlights the challenges of managing infections in immunocompromised patients and underscores the limitations of vaccination and therapeutic strategies.