Why is pneumonia considered a dangerous disease?

Explanation

Inflammation of the lungs due to infection caused,by bacteeria or virus is called pneumonia.
2. The common symptoms are sputum production, nasal congestion,shortness of breath, sore throat, etc.
3. Bacterial pneumonia is serious as it causessevere symptoms. Viral pneumonia can be fatal since it triggers a severe inflammation of thelungs.
4. Further pneumonia can cause complications ifthe patient has a weakened immune system.