respiratory disease characterized by inflammation of the lung parenchyma (excluding the bronchi) with congestion caused by viruses or bacteria or irritants
"After catching a severe viral infection, Dr. Lee diagnosed me with pneumonia and prescribed antibiotics to clear up the inflammation in my lung tissue."
An acute or chronic inflammation of the lungs caused by viruses, bacteria or other microorganisms, or sometimes by physical or chemical irritants.
"After catching a severe bacterial infection last week, Dr. Smith diagnosed me with pneumonia and prescribed strong antibiotics to clear the inflammation in my lungs."