Evidence Based Practices to Prevent Ventilator Associated Pneumonia in an Intensive Care Unit in Bangladesh Ventilator Associated Pneumonia (VAP) is a serious lung infection that occurs in patients on mechanical ventilation for over 48 hours. It is often caused by bacteria entering the lungs through the ventilator, leading 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 Vap Disease Ventilator Associated Pneumonia (VAP) in Neurocritical Patients: The Hidden Dialog of Brain and Infection