【单选题】
A 65-year-old man who is a heavy smoker complains of sudden onset of malaise, fever, productive cough, abdominal pain, and muscle aches. A chest X-ray shows bilateral, diffuse, patchy, alveolar infi ltrates. Laboratory studies reveal that the patient is infected with Legionella pneumophila. This patient’s pneumonia is characterized by extensive pulmonary infiltrates of which of the following cell types?
A.
(A) CD4+ helper T cells
B.
(B) CD8+ killer T cells
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