# Compare Immunological Efficacy of a Vaccine Regimen Combining Two Covid19 mRNA Vaccines (Pfizer-BioNTech and Moderna) With That of a Homologous Vaccination of Each Covid19 mRNA Vaccine

> **NCT04900467** · NA · UNKNOWN · sponsor: **Assistance Publique - Hôpitaux de Paris** · enrollment: 418 (actual)

## Conditions studied

- Adult Who Received a First Dose of an mRNA Vaccine (Pfizer-BioNTech or Moderna) and Need to Receive a Second Dose

## Interventions

- **BIOLOGICAL:** Pfizer
- **BIOLOGICAL:** Moderna

## Key facts

- **NCT ID:** NCT04900467
- **Lead sponsor:** Assistance Publique - Hôpitaux de Paris
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** UNKNOWN
- **Start date:** 2021-05-28
- **Primary completion:** 2021-07-02
- **Final completion:** 2022-01
- **Target enrollment:** 418 (ACTUAL)
- **Last updated:** 2021-08-03

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04900467

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04900467, "Compare Immunological Efficacy of a Vaccine Regimen Combining Two Covid19 mRNA Vaccines (Pfizer-BioNTech and Moderna) With That of a Homologous Vaccination of Each Covid19 mRNA Vaccine". Retrieved via AI Analytics 2026-06-02 from https://api.ai-analytics.org/clinical/NCT04900467. Licensed CC0.

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