Final answer:
Human pneumovirus, also known as respiratory syncytial virus (RSV), is isolated from young children with respiratory tract disease. It is highly contagious and can lead to severe respiratory infections in infants.
Step-by-step explanation:
Viral pneumonia can be caused by various viruses, including human pneumovirus. This virus is indeed isolated from young children with respiratory tract disease. Human pneumovirus, also known as respiratory syncytial virus (RSV), is highly contagious and can lead to severe respiratory infections in infants. It can be spread through respiratory droplets and can also survive on surfaces. There are currently no specific antiviral therapies or vaccines available for RSV infections.