A Phase 1 Study to Evaluate Safety and Immune Response of New Pneumococcal Vaccine V118C Compared to PCV20 in Infants and Toddlers

What this Trial Is About

Researchers are evaluating a new vaccine called V118C designed to help prevent pneumococcal disease, an infection caused by Streptococcus pneumoniae bacteria. This clinical trial focuses on infants and toddlers to assess how safe and well-tolerated V118C is in young children. The study is a Phase 1, randomized, double-blind trial comparing V118C with an existing vaccine called PCV20. The study is divided into two stages. Stage 1 involves toddlers aged 12 to 15 months who have already received a primary series of three doses of PCV vaccine they will receive a single dose of either V118C or PCV20. Stage 2 includes infants starting at approximately 2 months old who will receive four doses three infant doses plus one toddler dose of either V118C or PCV20. All doses are given as 0.5 mL intramuscular injections. Participants will be monitored closely for adverse events immediately after vaccination, as well as for up to 12 months postvaccination. Researchers will collect blood samples to measure immune responses to the vaccines. They will track both injection site and systemic reactions, serious adverse events, and medically attended events. The study aims to understand both safety and immune response profiles of V118C compared to PCV20 over the course of the dosing schedules and follow-up periods.

A Clinical Study of Novel Pneumococcal Vaccine V118C in Children (V118C-002)