Q. An 11-month-old boy is brought to the physician’s office with complaints of fever and cough for the past 5 days. The child’s mother says that her son has had recurrent episodes of upper and lower respiratory infections in the last 5 months. His birth history shows that he is born at term with normal height and weight via vaginal delivery and with no complications. His temperature is 38.9°C (102°F), heart rate is 110/minute, respiratory rate is 29/minute, and blood pressure is 90/70 mmHg. The child appears visibly sick. On physical examination, adenoids and tonsils are absent. Auscultation of the chest shows crackles on the right lower chest. Laboratory examination reveals normal WBC counts including normal neutrophil and lymphocyte counts. The serum immunoglobulin levels (IgG, IgA, IgM) are low. Flow cytometry reveals normal levels of NK cells and T lymphocytes but very low levels of B lymphocytes. Chest X-ray reveals right lower lobe consolidation. Which of the following statements is FALSE about the disease that this child is suffering from?