# A Study to Learn About a Vaccine Against E Coli in Healthy Adults

> **NCT07122986** · PHASE1 · RECRUITING · sponsor: **Pfizer** · enrollment: 310 (estimated)

## Conditions studied

- Healthy Participants

## Interventions

- **DRUG:** E coli vaccine 1 Dose A
- **DRUG:** E coli vaccine 1 Dose B
- **DRUG:** E coli vaccine 2
- **DRUG:** E coli vaccine 3
- **DRUG:** E coli Vaccine 4 Dose A
- **DRUG:** E coli Vaccine 4 Dose B
- **DRUG:** E coli Vaccine 4 Dose C
- **DRUG:** E coli Vaccine 5 Dose A
- **DRUG:** E coli Vaccine 5 Dose B
- **DRUG:** Placebo

## Key facts

- **NCT ID:** NCT07122986
- **Lead sponsor:** Pfizer
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE1
- **Study type:** INTERVENTIONAL
- **Status:** RECRUITING
- **Start date:** 2025-08-11
- **Primary completion:** 2028-05-26
- **Final completion:** 2028-05-26
- **Target enrollment:** 310 (ESTIMATED)
- **Last updated:** 2026-04-30


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT07122986

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT07122986, "A Study to Learn About a Vaccine Against E Coli in Healthy Adults". Retrieved via AI Analytics 2026-05-26 from https://api.ai-analytics.org/clinical/NCT07122986. Licensed CC0.

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