Respiratory Syncytial Virus (RSV), is a prevalent and contagious virus that affects the respiratory system, particularly in young children and older adults. RSV infections often lead to mild cold-like symptoms, but in some cases, especially in infants and individuals with compromised immune systems, it can cause severe respiratory issues.

RSV is a leading cause of bronchiolitis (inflammation of the small airways in the lungs) and pneumonia in children under the age of one.