What is the definition of hospitalacquired pneumonia (HAP) and how does it differ from ventilatorassociated pneumonia (VAP)? Metagenomics for the microbiological diagnosis of hospital acquired pneumonia and ventilator associated pneumonia (HAP VAP) in intensive care unit (ICU): a proof of concept study Respiratory Research Springer Nature Link Review of Hospital Acquired, Ventilator Associated, and Health CareAssociated Pneumonia in Immunocompetent Adults Epidemiology, Treatment, and Prevention of Nosocomial Bacterial Pneumonia Introductory Chapter: Pneumonia IntechOpen