<unk>  is a pneumonia caused by a virus. Pneumonia is an infection that causes inflammation in one or both of the lungs. The pulmonary alveoli fill with fluid or pus making it difficult to breathe. Pneumonia can be caused by bacteria, viruses, fungi or parasites. Viruses are the most common cause of pneumonia in children, while in adults bacteria are a more common cause.
Viral pneumonia
Fungal pneumonia
Bacterial pneumonia
Dust pneumonia
Atypical pneumonia
Parasitic pneumonia
Aspiration pneumonia
Community-acquired pneumonia