The medical abbreviation "PNA" stands for "Pneumonia". Pneumonia is an infection that inflames the air sacs in one or both lungs. It can be caused by bacteria, viruses, or fungi, and symptoms may include coughing, fever, chest pain, shortness of breath, and fatigue.
The diagnosis of pneumonia is often made through imaging tests such as a chest X-ray or CT scan, as well as a physical exam and medical history. Treatment may involve antibiotics, antiviral medications, or antifungal medications, depending on the underlying cause of the infection.