They are generally mild and rarely require hospitalization when they are appropriately treated, although recovery may still be prolonged. Severe and life-threatening cases are more likely to occur in elderly people with other medication conditions. Poses a risk for abscesses and severe lung tissue damage. Legionella pneumophila . Particularly virulent and can cause damage throughout the body.
Viral pneumonia is usually very mild but there are exceptions.
Influenza pneumonia can be very serious. However, between 22,000 and 44,500 children are hospitalized each year because of pneumonia from RSV and the incidence seems to be increasing. Complications of Pneumonia Abscesses. They are frequently a result of aspiration pneumonia, when a mixture of organisms is carried into the lung. Abscesses can cause hemorrhage in the lung if untreated, but antibiotics that target specific anaerobic bacteria and other organisms have significantly reduced their danger.