Efficacy of quality improvement interventions on antibiotic prescription practices for ventilator associated pneumonia at a tertiary care centre: a prospective prepost interventional study BMJ Open Quality 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 Figures The multimodal approach for ventilator associated pneumonia preventionrequirements for nationwide implementation lvarez Lerma Annals of Translational Medicine