What is the definition of hospitalacquired pneumonia (HAP) and how does it differ from ventilatorassociated pneumonia (VAP)? Hap Vap NEW: CAP, HAP, and VAP Resources Download the free charts and take the knowledge check quizzes in your Pyrls app or website today! Summary of the international clinical guidelines for the management of hospital acquired and ventilator acquired pneumonia European Respiratory Society Introductory Chapter: Pneumonia IntechOpen