A charge nurse is planning a room assignment for a client who has a productive cough, a questionable chest x-ray, and a positive Mantoux test. Room 208 is a private, negative-pressure airflow room; room 212 is a semi-private, positive-pressure airflow room; 214 is a negative- pressure, semi-private room; and room 216 is a private, positive-pressure airflow room. To which of the following rooms should the nurse assign the client?