Single-dose Cervarix induces durable seropositivity but fails HPV‑16 GMC non-inferiority versus three-dose Gardasil-4: implications from the PRIMAVERA immunobridging trial
Posted inInfectious Diseases news Public Health

Single-dose Cervarix induces durable seropositivity but fails HPV‑16 GMC non-inferiority versus three-dose Gardasil-4: implications from the PRIMAVERA immunobridging trial

PRIMAVERA immunobridging shows single-dose Cervarix induces near-universal seropositivity at 36 months and non-inferior HPV-18 antibodies versus three-dose Gardasil-4, but HPV-16 antibody GMCs were lower; results inform but do not yet support regulatory single-dose approval.
Recombinant Quadrivalent Influenza Vaccine (RIV4) Shows Non‑Inferior Immunogenicity and Acceptable Safety in 9–17‑Year‑Olds: Results of a Phase 3 Immunobridging Study
Posted inInfectious Diseases news Pediatrics

Recombinant Quadrivalent Influenza Vaccine (RIV4) Shows Non‑Inferior Immunogenicity and Acceptable Safety in 9–17‑Year‑Olds: Results of a Phase 3 Immunobridging Study

A phase 3 immunobridging study found that a single dose of recombinant quadrivalent influenza vaccine (RIV4) induced non‑inferior HAI responses in 9–17‑year‑olds vs 18–49‑year‑olds, with a comparable safety profile and fewer solicited reactions in adolescents.