Placebo is 0.9% (w/v) NaCl for injection and is to be provided by sites. clinical trials

A Phase 3, Global, Randomized, Modified Double-Blind, Placebo‑Controlled, Study to Evaluate the Efficacy, Immunogenicity, and Safety of IVX-A12, a Respiratory Syncytial Virus (RSV) and Human Metapneumovirus (hMPV) Virus-Like Particle (VLP) Vaccine in Adults 60 Years of Age and Older.

This study is testing a new vaccine for older adults (60+) against two common winter bugs: Respiratory Syncytial Virus (RSV) and human Metapneumovirus (hMPV). It aims to see if the vaccine prevents these illnesses and is safe.