A single-center observational study of nirsevimab for prevention of RSV infection in preterm infants - Report - MDSpire

A single-center observational study of nirsevimab for prevention of RSV infection in preterm infants

  • By

  • Rina Su

  • Rigonggaowa A

  • Fang Yao

  • Yanbin An

  • Cheng Cai

  • Lei Yun

  • July 8, 2026

  • 0 min

Share

Clinical Report: An Observational Study on Nirsevimab for RSV Prevention

Overview

This study evaluates the efficacy of nirsevimab in preventing RSV infections in preterm infants, demonstrating a significant reduction in infection rates and rehospitalization.

Background

Respiratory syncytial virus (RSV) is a leading cause of respiratory infections in newborns, particularly affecting preterm infants who are at higher risk due to their immature respiratory systems. Current preventive measures are limited, making the evaluation of nirsevimab, a newly approved monoclonal antibody for RSV prevention, critical for improving neonatal health outcomes.

Data Highlights

GroupEfficacy RateRSV InfectionsRehospitalization
Nirsevimab Immunized98.73%0No
Non-Immunized84.81%12 (15.18%)Yes (Average stay: 15.5 days)

Key Findings

  • The efficacy rate of nirsevimab in preventing RSV infections was 98.73% compared to 84.81% in the non-immunized group (p < 0.05).
  • In the non-immunized group, 15.18% of infants developed RSV infections, with some requiring respiratory support.
  • All RSV-infected infants in the non-immunized group required rehospitalization, averaging 15.5 days.
  • No significant adverse reactions were reported in the nirsevimab immunized group.

Clinical Implications

The findings support the use of nirsevimab as an effective preventive measure against RSV in preterm infants, potentially reducing hospitalization rates. Clinicians should consider nirsevimab for at-risk infants during RSV season to improve respiratory health outcomes.

Conclusion

Nirsevimab significantly reduces RSV infection rates and rehospitalization in preterm infants.

Related Resources & Content

  1. JAMA Network Open, 2024 -- Nirsevimab and a Community Recall-Based Immunization Strategy for Child Bronchiolitis Prevention
  2. conexiant, 2024 -- Nirsevimab Linked to Lower Infant Hospitalization Risk Than Maternal Vaccine
  3. conexiant, 2024 -- RSV Prevention Tied to Lower Infant Acute Care Use
  4. Infection, 2024 -- Impact of Nirsevimab Immunization Recommendations on RSV-Related Lower Respiratory Infections in Hospitalized and Outpatient Children Under 2 in Northern Bavaria in 2024
  5. CDC, 2024 -- RSV Immunization Guidance for Infants and Young Children
  6. CDC -- Interim Evaluation of Respiratory Syncytial Virus Hospitalization Rates
  7. RSV Immunization Guidance for Infants and Young Children | RSV | CDC

Original Source(s)

Related Content