<prompt> Which of the following is the most common illness leading to development of ARDS?Aspiration of gastric contentsHead traumaDrug overdoseBacterial pneumonia  <response>: Most cases 80 are caused by a relatively small number of clinical disorders: severe sepsis syndrome andor bacterial pneumonia 40-50, trauma, multiple transfusions, aspiration of gastric contents, and drug overdose. Among patients with trauma, the most frequently repoed surgical conditions in ARDS are pulmonary contusion, multiple bone fractures, and chest wall traumaflail chest, whereas head trauma, near-drowning, toxic inhalation, and burns are rare causes.Ref: Harrison 19e pg: 1736 