CI

At a glance

ClinicalIndex Comparison Record
Phase 3Completed· 4,065 enrolled
Drug / intervention
AVX-COVID/12 +1 morebiological
Likely dose
Not stated in record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT05710783
NCT05710783Phase 3Completed

Phase II/III Parallel, Double-blind, Non-inferiority Study With Active Control, to Evaluate the Immunogenicity and Safety of a Booster Immunization Scheme With a Single Intramuscular Dose of the Recombinant Vaccine Against SARS-CoV-2

Laboratorio Avi-Mex, S.A. de C.V.·interventional·Posted Feb 2, 2023·Updated Oct 2, 2025

In Brief

A Phase 3 clinical trial evaluating AVX-COVID/12 and ChAdOx-1-S[recombinant] for SARS-CoV-2 Infection. Completed, enrolled 4,065 participants across 14 sites.

Detailed Summary

This is a phase II/III parallel, double-blind, active-controlled, non-inferiority study to evaluate immunogenicity and safety of a booster immunization scheme of a single intramuscular dose of the recombinant vaccine against SARS-CoV-2 (AVX/COVID-12 vaccine) based on live recombinant Newcastle disease virus (rNDV) vector in healthy adults with a history of vaccination against COVID-19. The study is divided into two phases with immuno-bridging and 3000 healthy subjects showing evidence of prior immunity to SARS-CoV-2 are estimated to enrol. To verify non-inferiority in a determined number of subjects an intramuscular dose of the COVID-19 vaccine (ChAdOx-1-S\[recombinant\]) shall be used as active control in originally randomised subjects. The study shall be carried out in several sites of clinical research in Mexico.

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
CountriesMexico

Timeline

Phase 3CompletedFinished
2023202420252026
First PostedFeb 2, 2023
Enrollment StartNov 9, 2022
Primary CompletionDec 28, 2022
Study CompletionSep 10, 2023
TodayJul 2, 2026
Enrollment to primary: 2 monthsPosted 3.4 years ago

Interventions

AVX-COVID/12biological

Single dose IM administration of a Recombinant Newcastle Disease Virus Vectored Vaccine for SARS-CoV-2

ChAdOx-1-S[recombinant]biological

Single dose IM administration of ChAdOx1 nCOV-19 (Astra-Zeneca) adenovirus-vectored vaccine