Introduction Pneumonia is a serious lung infection that affects millions of people worldwide each year. It occurs when the air sacs in the lungs (alveoli) become inflamed and filled with fluid or pus, making it difficult to breathe. While pneumonia can be caused by different organisms, the three most common categories are bacterial, viral, and fungal pneumonia. Each type has distinct causes, symptoms, and treatment approaches, which makes accurate diagnosis critical for effective care. In this article, we’ll explore the differences between bacterial, viral, and fungal pneumonia, focusing on their causes, risk factors, symptoms, and treatment options. What Is Pneumonia?…