Walking pneumonia is what it sounds like, a form of pneumonia so seemingly mild that people with the bacterial illness are ...

The term "pneumonia" describes a group of symptoms that may be caused by bacteria, viruses, parasites, or fungi. Pneumonia is a severe inflammation of the lungs in which the thin tissue around air ...

Pneumonia may inflame the air sacs in one or both of your lungs, notes the Mayo Clinic. The sacs can fill with pus or fluid, ...