Overview Safety, Tolerability and Immunogenicity of a Novel Inactivated Whole-cell Pneumococcal Vaccine Gamma PN-3. Status: Recruiting Trial end date: 2023-08-31 Target enrollment: Participant gender: Summary This is a randomised placebo-controlled first-in-man dose-ranging study to determine safety and markers of efficacy. Phase: Phase 1 Details Lead Sponsor: GPN VaccinesTreatments: Heptavalent Pneumococcal Conjugate Vaccine