Pneumonia Stages, Their Symptoms, and Condition Management - Healthline
Pneumonia is a lung infection that's caused by bacteria, viruses, or fungi. It ranges from mild to severe. Some cases of pneumonia occur as a complication of another infection, like influenza or COVID-19. It can affect the entirety of your lungs or only certain portions. Your lungs are divided into five lobes — an upper, middle lobe, and lower lobe on the right as well as an upper and lower lobe on the left. While there are many types of pneumonia based on the organism that caused the infection, pneumonia is generally divided into two major groups based on how much of your lungs is affected. Depending on which lobes or areas of your respiratory system are affected, you may be diagnosed with: Bronchopneumonia. Bronchopneumonia is a type of pneumonia that mostly affects the bronchi and bronchioles. These are the system of tubes that bring air into your lungs. This type of pneumonia often spreads to other parts of the lungs if not treated effectively. Lobar pneumonia. This refers to...