A Randomized, Double-blind, Placebo-controlled Phase 3 Study to Evaluate the Immunogenicity and Safety of Ad26.RSV.preF-based Vaccine and High-dose Seasonal Influenza Vaccine, With and Without Coadministration, in Adults Aged 65 Years and Older

The purpose of this study is to evaluate the immunogenicity and safety of Ad26.RSV.preF-based vaccine and quadrivalent high-dose seasonal influenza vaccine when administered either concomitantly or separately.

本研究旨在评估Ad26.RSV.preF疫苗（以腺病毒血清型26为载体的呼吸道合胞病毒预融合F蛋白疫苗）与四价高剂量季节性流感疫苗，在联合接种或单独接种方案下的免疫原性与安全性。