Final answer:
PNA stands for Pneumonia, which is an infection that inflames the air sacs in the lungs and can be caused by bacteria, viruses, or fungi.
Step-by-step explanation:
Pneumonia is an inflammatory condition of the lung affecting the air sacs (alveoli) and surrounding tissues. It can be caused by various infectious agents, including bacteria, viruses, fungi, and other microorganisms. Pneumonia can range in severity from mild to life-threatening and often presents with symptoms such as cough, fever, and difficulty breathing
The abbreviation PNA stands for Pneumonia. Pneumonia is an infection that inflames the air sacs in one or both lungs, causing cough with phlegm or pus, fever, chills, and difficulty breathing. It can be caused by bacteria, viruses, or fungi.