Main endogenous and exogenous risk factors for VAP. Download Scientific Diagram 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 Antimicrobial Resistance in Ventilator Associated Pneumonia: Predictive Microbiology and Evidence Based Therapy Infectious Diseases and Therapy Springer Nature Link Ventilator Associated Pneumonia (VAP) EMCrit Project