RSV has a global distribution and affects people of all ages. It is a significant cause of respiratory illness in infants and young children. The virus has a seasonal pattern, with peaks typically occurring during the fall, winter, and spring in temperate climates. In tropical climates, RSV transmission can occur year-round with seasonal peaks. Each year, RSV is responsible for an estimated 3.2 million hospitalizations and 118,200 deaths worldwide among children under five years of age. In the United States, RSV is a leading cause of hospitalization in infants.
