From Common Infection to Critical Threat Pneumonia is a lung infection that can be: Community acquired (CAP) contracted outside healthcare settings Hospital acquired (HAP) develops during a hospital stay Ventilator associated (VAP) Hospital Acquired Pneumonia (HAP) EMCrit Project Figure 2 from Treatment guidelines and outcomes of hospital acquired and ventilator associated pneumonia. Semantic Scholar PDF] Clinical practice guidelines for hospital acquired pneumonia and ventilator associated pneumonia in adults. Semantic Scholar American Thoracic Society Documents Colgate Oral Health Network