What is Community-acquired pneumonia?
Community-acquired pneumonia (CAP) is pneumonia (any of several lung diseases) acquired infectiously from normal social contact (that is, in the community) as opposed to being acquired during hospitalization (hospital-acquired pneumonia). In community-acquired pneumonia, individuals who have not recently been hospitalized develop an infection of the lungs (pneumonia). CAP is a common illness and can affect people of all ages. CAP often causes problems such as difficulty breathing, fever, chest pains, and a cough. CAP occurs because the areas of the lung that absorb oxygen (alveoli) from the atmosphere become filled with fluid and cannot work effectively.