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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 2-year-old boy is brought to the physician for the evaluation of fever, breathing difficulty, and cough during the past week. In the past year, the patient was diagnosed with four sinus infections, 3 upper respiratory tract infections, and an episode of severe bronchiolitis requiring hospitalization. Since birth, he has had multiple episodes of oral thrush treated with nystatin, as well as chronic diarrhea and failure to thrive. His temperature is 38.0°C (100.4°F), pulse is 130/min, respirations are 38/min, and blood pressure is 106/63 mm Hg. Pulse oximetry at room air shows an oxygen saturation of 88%. Pulmonary auscultation shows bilateral crackles and wheezing. Physical examination indicates a prominent nasal bridge, hypoplastic nasal wing, a shortened chin, and dysplastic ears. An X-ray of the chest shows hyperinflation of the lungs, interstitial infiltrates, and atelectasis. The patient tests positive for respiratory syncytial virus (RSV) in the nasopharyngeal aspirate. This patient most likely has a deficiency of which of the following?
assistant
T cells