The respiratory tract is the parts of the body related to breathing (respiration). It includes the nose, windpipe, air passages in the lungs, and the lungs. RSV is a virus Overview of Viral Infections A virus is a tiny living organism. Viruses are so small they can be seen only with the most powerful microscopes. That's why they're called microorganisms (micro means very small). Other common... read more that infects the respiratory tract.
RSV infections spread easily among babies and children, usually in winter and early spring
Nearly all children get the virus by age 4
RSV causes runny nose, fever, cough, and wheezing
Most children don't have problems, but severe infections cause trouble breathing and low oxygen levels
Someone can have RSV more than once, but symptoms are usually milder after the first time
RSV is one of many viruses that infect the respiratory tract. Others include the cold Common Cold The common cold is a viral infection. It's one of the most common illnesses people get. Colds spread easily from person to person, especially within the first 2 days of symptoms Symptoms include... read more virus and the flu Influenza (Flu) Influenza, often called the flu, is a viral infection that affects your lungs and airways. Flu symptoms are a little bit like the common cold but are much more severe. The flu spreads easily... read more virus.
When someone with RSV coughs or sneezes, a nearby person can get the virus by breathing in or touching droplets in the air that have the virus.
Children usually get symptoms like:
In older children and adults, symptoms usually aren't serious. However, in babies, symptoms can be severe:
There's is no vaccine to prevent RSV. People with young children should wash their hands a lot to keep from passing on the virus.
Rarely, doctors give monthly shots of a medicine (palivizumab) that can make RSV infection less severe. They use this medicine only in children who are most likely to have serious breathing problems from RSV (for example, young children who have serious heart or lung disease or those who were born very premature).