Impact of Maternal Vaccination Against Respiratory Syncytial Virus Prefusion F
Overview
The study evaluates the effectiveness of the RSV prefusion F vaccine administered to pregnant individuals in reducing RSV-associated acute respiratory illness (ARI) and lower respiratory tract disease (LRTD) in infants. Preliminary findings indicate vaccine efficacy against RSV-associated hospitalizations in infants aged 0 to 90 days.
Background
Respiratory syncytial virus (RSV) is a major cause of lower respiratory tract disease in infants, leading to millions of hospitalizations and deaths annually. The recent approval of the RSV prefusion F vaccine aims to provide protection to infants through maternal immunization.
Data Highlights
Outcome
Vaccine Effectiveness
Confidence Interval
RSV-associated medically attended LRTD
57.6%
95% CI, 31.3%-74.6%
Severe LRTD
82.4%
95% CI, 57.5%-93.9%
RSV-associated hospitalization
69.7%
95% CI, 37.1%-86.7%
Key Findings
The RSV prefusion F vaccine demonstrated 57.6% efficacy against RSV-associated medically attended LRTD in infants.
For severe LRTD, the vaccine showed an efficacy of 82.4%.
Vaccine effectiveness against RSV-associated hospitalization was reported at 69.7%.
The study utilized a test-negative design to estimate vaccine effectiveness, minimizing bias.
Data were collected from a semiclosed health system in Western Pennsylvania.
Clinical Implications
The findings suggest that maternal vaccination with RSVpreF can significantly reduce the incidence of RSV-related hospitalizations in infants. Clinicians should consider the timing of vaccination during pregnancy to maximize the protective benefits for newborns.
Conclusion
The interim analysis indicates that maternal vaccination with RSVprefusion F is effective in reducing RSV-associated acute respiratory illness and hospitalization in infants.
by Anne-Marie Rick, Jennifer Deese, Jessica E. Kerr, Jonathan Hui, Hui Liu, Guan Yu, Chung-Chou H. Chang, Nicole Fazio, Muhammad H. Tahir, Rachael Bieltz, Anjani Ravindra, Christina Megli, Arun Jeyabalan, Sarah J. Pugh, Divya Patel, Rong Fan, Jessica E. Atwell, Alejandro Cané, Judith M. Martin
