Recommendations on Respiratory Syncytial Virus (RSV) Immunization Strategies for Infants and Young Children in Countries with Year-Round RSV Activity.

Background/Objectives: Respiratory syncytial virus (RSV) is the most common cause of lower respiratory tract infection in young children, especially during infancy, resulting in substantial morbidity and mortality. Methods: Acknowledging the real-world evidence on RSV immunization, the College of Pediatrics, Academy of Medicine of Malaysia, has appointed an expert panel to develop a position paper on recommendations for infant and/or maternal vaccination against childhood RSV, specifically in the Malaysian context with year-round RSV activity. Results: Recognizing the potential constraints and limitations in the implementation process, the expert panel recommends targeted immunization with long-acting RSV monoclonal antibody (mAb) for high-risk infants as a pragmatic first step, with subsequent scale-up to universal immunization of infants when resources permit. Conclusions: Immunization is the most effective strategy to prevent RSV-related lower respiratory tract infection in childhood. Year-round maternal vaccination between 28 and 36 weeks' gestation, combined with immunization at six months for all infants, may potentially circumvent the unclear seasonality.