RESPIRATORY SYNCYTIAL VIRUS (RSV)

Respiratory syncytial virus (RSV) is a virus that causes an upper and lower respiratory tract infection called bronchiolitis. Children and infants under 2 years, but especially those around 6 months of age, are at greatest risk. RSV is highly contagious. It is spread by contact with infected fluids from the nose or mouth and from droplets in the air from coughing. RSV usually occurs in the late fall, winter, and early spring. There is currently no effective vaccine to prevent infection with respiratory syncytial virus.

RSV bronchiolitis is a potentially serious respiratory disease that can be life-threatening. Infants at greatest risk are those born prematurely, had a low birth weight, have congenital heart or lung disease, or a suppressed immune system.

It usually starts with a runny nose, a low-grade fever, and a cough. After a day or two, the cough becomes a deep, hacking cough. Breathing can quickly worsen with noticeable wheezing and fast, shallow breathing. At times, the infection can cause severe, even life-threatening symptoms that require hospitalization.

It is important to watch the child's breathing pattern because it may get worse very quickly. If the child is breathing so hard they can not cry or talk, if their nostrils are flaring, they are struggling for each breath, or are very drowsy, call 911 or the emergency medical system. Call your healthcare provider immediately if the child develops loud wheezing or worsening cough.

Disclaimer: This content is reviewed periodically and is subject to change as new health information becomes available. The information provided is intended to be informative and educational and is not a replacement for professional medical evaluation, advice, diagnosis or treatment by a healthcare professional.

HIL File RESP4929.RF2 VRS# 4929 Data Version 7.0