Respiratory Syncytial Virus (RSV) is a viral disease that primarily affects young children during winter. It can lead to mild symptoms such as runny nose, coughing, and fever, but in serious cases, it may require hospitalization. RSV also poses a risk to the elderly. It can cause complications like bronchiolitis, a chest infection. Although there is no specific treatment, there are ways to relieve the symptoms. A vaccine has been approved in the UK to prevent RSV in infants and toddlers.