Ventilator associated pneumonia in adult patients: development and validity of a bundle and a checklist Guidelines for the prevention of ventilator associated pneumonia and their implementation. The Spanish Zero VAP bundle Medicina Intensiva Magasin de CE Malaunay VAP (Ventilator Associated Pneumonia) Explained Simply for Nurses Ventilator Associated Pneumonia (VAP) is a serious hospital acquired infection that develops 48 hours or more after mechanical ventilation. It significantly increases ICU stay