A patient develops sudden-onset dyspnea, a cough with frothy…

A patient develops sudden-onset dyspnea, a cough with frothy pink sputum, and a temperature of 102.2°F (39°C) four hours after a blood transfusion. The blood pressure has dropped from 130/80 to 90/50. A chest X-ray shows bilateral infiltrates. The nurse suspects the patient is developing a: