“…As a comparison at a regional level, in a prospective cohort study of 207 very low-birth weight (birth weight 1,500 g) pre-mature infants followed until 1 year of age in Buenos Aires, Argentina, the incidence of RSV-associated hospitalizations was approximately 90 per 1,000 child-years of follow-up. 6,7 Children with underlying conditions, such as pre-maturity, chronic lung disease, congenital heart disease, and immunosuppression, are at high risk for severe RSV disease. 8 Prematurity, a major risk factor for RSV hospitalization, goes along with small, immature, and vulnerable airways, an immature immune system, an incomplete transfer of maternal antibodies, and an inadequate cellular immunity.…”