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ClinicalTrials.gov public records Last synced May 22, 2026, 5:05 AM EDT

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Filters: Condition: Clostridoides Difficile Associated Disease Clear all
Active, not recruiting Phase 1Phase 2 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Clostridoides Difficile Associated Disease
Interventions
C. difficile vaccine (previously studied formulation)., C. difficile vaccine formulation 1., C. difficile vaccine formulation 2., C. difficile vaccine formulation 3., Saline Placebo.
Biological · Other
Lead sponsor
Pfizer
Industry
Eligibility
50 Years and older
Enrollment
936 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2031
U.S. locations
23
States / cities
Phoenix, Arizona • Anaheim, California • Doral, Florida + 17 more
Source: ClinicalTrials.gov public record
Updated Apr 28, 2026 · Synced May 22, 2026, 5:05 AM EDT