Community acquired Pneumonia and Hospital acquired Pneumonia Medical Clinics Unravelling the complexity of ventilator associated pneumonia: a systematic methodological literature review of diagnostic criteria and definitions used in clinical research Critical Care Springer Nature Link Flow chart of the study. CAP = community acquired pneumonia, HAP = Download Scientific Diagram International ERS ESICM ESCMID ALAT guidelines for the management of hospital acquired pneumonia and ventilator associated pneumonia European Respiratory Society Cap Vap Hap CAP 2019 HAP VAP 2016 Ref. https: www.idsociety.org practice guideline community acquired pneumonia cap in adults https: www.idsociety.org practice guideline hap_vap