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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 54-year-old male presents to the emergency department with nasal congestion and sore throat. He also endorses ten days of fatigue, rhinorrhea and cough, which he reports are getting worse. For the last four days, he has also had facial pain and thicker nasal drainage. The patient’s past medical history includes obesity, type II diabetes mellitus, and mild intermittent asthma. His home medications include metformin and an albuterol inhaler as needed. The patient has a 40 pack-year smoking history and drinks 6-12 beers per week. His temperature is 102.8°F (39.3°C), blood pressure is 145/96 mmHg, pulse is 105/min, and respirations are 16/min. On physical exam, he has poor dentition. Purulent mucus is draining from his nares, and his oropharynx is erythematous. His maxillary sinuses are tender to palpation.

Which one of the following is the most common risk factor for this condition?
assistant
Viral infection