Nirsevimab for Prevention of RSV in Healthy Late-Preterm and Term Infants

🤖 Plain-English Summary

BACKGROUND: Respiratory syncytial virus (RSV) is a major cause of lower respiratory tract infection and hospitalization in infants. CONCLUSIONS: A single injection of nirsevimab administered before the RSV season protected healthy late-preterm and term infants from medically attended RSV-associated lower respiratory tract infection.

🔑 Key Findings

• Nirsevimab is a monoclonal antibody to the RSV fusion protein that has an extended half-life.
• The efficacy and safety of nirsevimab in healthy late-preterm and term infants are uncertain.
• METHODS: We randomly assigned, in a 2:1 ratio, infants who had been born at a gestational age of at least 35 weeks to receive a single intramuscular injection of nirsevimab or placebo before the start of an RSV season.

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