A phase 3 randomized trial of the safety and immunogenicity of 20-valent pneumococcal conjugate vaccine in adultsâ¯≥â¯60 years of age in Japan, South Korea, and Taiwan.
Vaccine
; 42(5): 1071-1077, 2024 Feb 15.
Article
em En
| MEDLINE
| ID: mdl-38267330
ABSTRACT
BACKGROUND:
Pneumococcal infections are associated with high disease burden in older individuals in Japan, South Korea, and Taiwan. The 20-valent pneumococcal conjugate vaccine (PCV20) was developed to extend protection beyond earlier pneumococcal vaccines.METHODS:
This phase 3 randomized, double-blind study investigated the safety and immunogenicity of PCV20 in participantsâ¯≥â¯60â¯years of age from Japan, South Korea, and Taiwan. Participants were randomized to receive PCV20 or 13-valent pneumococcal conjugate vaccine (PCV13). One month after vaccination, PCV20 recipients received a saline injection and PCV13 recipients received 23-valent polysaccharide vaccine (PPSV23). Primary immunogenicity objectives were to demonstrate noninferiority of PCV20 to PCV13 (13 matched serotypes) or PPSV23 (7 additional serotypes) for serotype-specific opsonophagocytic activity (OPA) geometric mean titers (GMTs) 1â¯month after vaccination with PCV20, PCV13, or PPSV23. Noninferiority for each serotype was declared if the lower bound of the 2-sided 95% CI for OPA geometric mean ratio (GMR) wasâ¯>â¯0.5. Safety endpoints included local reactions, systemic events, adverse events (AEs), and serious AEs.RESULTS:
Overall, 1421⬠participants were vaccinated (median age [range] 65 [60-85] years). PCV20 was noninferior to PCV13 for all 13 matched serotypes and to PPSV23 for 6 of 7 additional serotypes. Although statistical noninferiority was missed for serotype 8 (lower bound of the 2-sided 95% CI for OPA GMRâ¯=â¯0.5, thus not meeting the statistical noninferiority criterion ofâ¯>â¯0.5), secondary immunogenicity endpoints for serotype 8 were supportive of a robust immune response. The incidence of AEs and the frequency and severity of local reactions and systemic events were generally similar after PCV20 and PCV13. No safety concerns were identified.CONCLUSION:
PCV20 generated robust immune responses to all vaccine serotypes in older adults in Japan, South Korea, and Taiwan. The safety and tolerability profile was similar to PCV13. PCV20 is expected to help protect against all 20 vaccine serotypes. NCT04875533.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Infecções Pneumocócicas
/
Streptococcus pneumoniae
Tipo de estudo:
Clinical_trials
/
Prognostic_studies
Limite:
Aged
/
Humans
País/Região como assunto:
Asia
Idioma:
En
Revista:
Vaccine
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Japão