Clinical Trial: A Study to Evaluate Safety and Immunogenicity of 1 Booster Dose of 1790GAHB Vaccine in Healthy Adults Primed With 3 Doses of 1790GAHB Vaccine in Study H03_01TP Compared to 1 Vaccination of 1790GAHB in Either Subjects Who Received Placebo in the Same Study or naïve Subjects Not Part of H03_01TP Study

Study Status: Recruiting
Recruit Status: Recruiting
Study Type: Interventional

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Official Title: A Phase 1, Open Label, Non-randomized, Single Center Study to Evaluate the Safety and Immunogenicity of 1 Booster Vaccination With (GVGH Shigella Sonnei 1790GAHB) Vaccine Administered Intramuscularly

Brief Summary:

GVGH Shigella Sonnei 1970GAHB is a vaccine aimed at preventing the disease caused by Shigella sonnei.

A post-hoc analysis of subjects who participated in the parent study showed significantly different responses in subjects with detectable versus undetectable antibody titres at baseline, suggesting the possibility that the vaccine might not be sufficiently immunogenic in completely naïve adults.

This study was then designed to further characterize the immunogenicity profile of the vaccine and to evaluate whether it was able to induce an immunological memory response.