Respiratory Syncytial Virus Prefusion F Vaccination: Antibody Persistence and Revaccination.
J Infect Dis
; 2024 Apr 12.
Article
em En
| MEDLINE
| ID: mdl-38606958
ABSTRACT
BACKGROUND:
Respiratory syncytial virus (RSV) causes substantial respiratory disease. Bivalent RSV prefusion F (RSVpreF) vaccine is licensed in ≥60-year-olds. RSVpreF was well-tolerated and immunogenic in a phase 1/2 study. We evaluated antibody persistence after initial vaccination and safety and immunogenicity after revaccination from this study.METHODS:
Healthy adults were randomized to receive both initial vaccination and revaccination 12 months later with either placebo or RSVpreF 240 µg (±Al(OH)3). RSV-A and RSV-B geometric mean neutralizing titers (GMTs) were measured through 12 months after both vaccinations. Tolerability/safety was assessed.RESULTS:
There were 263 participants revaccinated (18-49-years-old, n=134; 65-85-years-old, n=129). Among 18-49-year-olds and 65-85-year-olds, respectively, geometric mean fold rises (GMFRs) for both RSV subgroups (RSV-A; RSV-B) 1 month after initial RSVpreF vaccination were 13.3-20.4 and 8.9-15.5 compared with levels before initial vaccination; corresponding GMFRs 12 months after initial vaccination were 4.1-5.0 and 2.6-4.1. GMFRs 1 month after revaccination compared with levels before revaccination were 1.4-2.3 and 1.4-2.2 for 18-49-year-olds and 65-85-year-olds, respectively. Peak GMTs after revaccination were lower than those after initial vaccination. GMTs 12 months after initial vaccination and revaccination were similar, with GMFRs ranging from 0.7-1.6. No safety signals occurred.CONCLUSIONS:
RSVpreF revaccination was immunogenic and well-tolerated among adults. NCT03529773.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
J Infect Dis
/
J. infect. dis
/
Journal of infectious diseases
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Estados Unidos