Ventilator Associated Pneumonia (VAP): A Review of Pathogenesis, Diagnosis, Risk Factors, Prevention, and Future Directions Ventilator associated pneumonia The BMJ VAP Bundle Ventilator Associated Pneumonia Ventilator Associated Pneumonia ( VAP) is a lung infection that occurs in patients who are on mechanical ventilation for more than 48 hours. A VAP bundle is a set of VAPING & VAP: Lungs Under Attack PulmCrit hot take: VAP prophylaxis (PROPHY VAP trial)