Related Pages. Respiratory syncytial (sin-SISH-uhl) virus, or RSV, is a common respiratory virus that usually causes mild, cold-like symptoms.

In adults and older children, RSV usually causes mild cold-like signs and symptoms.

– Congested or runny nose – Dry cough – Low-grade fever – Sore throat – Sneezing  – Headache

Most children and adults recover in one to two weeks, although some might have repeated wheezing.

Seek immediate medical attention if your child — or anyone at risk of severe RSV infection — has difficulty breathing, a high fever, or a blue color to the skin