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Respiratory Syncytial Virus (RSV)

Bronchiolitis is almost always caused by a viral infection. In most cases, the respiratory syncytial virus (RSV) is responsible.

RSV is a very common virus and almost all children are infected with it by the time they're two years old. In older children and adults, RSV may cause a cough or cold, but in young children it can cause bronchiolitis.

Useful links and resources:

 Supporting Advice for Parents & Carers: