Ventilator Associated Pneumonia (VAP) VAP is a subtype of hospital acquired pneumonia or Nosocomial pneumonia which occur in people who are receiving mechanical ventilation. It develops more than 48 hours after tracheal File:VAE, VAP and PNEU Definition Changes for 2015.webm Wikimedia Commons Update on ventilator associated pneumonia F1000Research Preventive bundle approach decreases the incidence of ventilator associated pneumonia in newborn infants Journal of Perinatology