Collaborative Study to Evaluate Heterologous Vaccination Against Covid-19 in Argentina
Trial Snapshot
- Phase
- Phase 2
- Sponsor
- Enrollment
- 1,760
- Locations
- 4
- Primary Endpoint
- Antibody against Spike protein measurement by ELISA test
Study Overview
Brief Summary
Randomized, open, multicenter, collaborative and adaptive non-inferiority trial to evaluate the immunogenicity and reactogenicity of the heterologous vaccination schedules made up of the combination of vaccines available in Argentina (Sputnik-V, AstraZeneca, Sinopharm and Moderna); and to compare the immunogenicity and reactogenicity of heterologous and homologous vaccination schedules.
Detailed Description
More than a hundred COVID-19 vaccines based on different technologies are currentlyin the clinical phase of development around the world. More than a dozen derived from different platforms have been approved by regulatory entities in several countries and are used to immunize the world's population.
The dynamics of the COVID-19 pandemic, the emergence of variants, the magnitude and durability of the immune response, the effectiveness of approved vaccination schemes, as well as the possibility of combining vaccines from various platforms, are some of the issues to be facedin public health decision-making, in order to deliver the best protection standards to the population.
Given the dynamics of the disease in Argentina, the access to different COVID-19 vaccination alternatives requires the development of various strategies, such as stratifying the population sampled by the risk of being infected or transmitting the disease, the agreement for the acquisition of vaccines produced by multiple laboratories simultaneously, setting as a priority first dose vaccination to a higher number of people in a shorter period of time and completing the schemes already started.
The pandemic has revealed the capacity of our country to carry out research studies that produce evidence to face the new challenges posed by COVID19 and, particularly,to implement vaccination as one of the main tools to reduce the health impact it generates-for example,six months after the start of the vaccination campaign, results demonstrate the positive impact of this strategy and its effectiveness.
Models based on heterologous immunization schemes with vaccines from different platforms require evaluation by means of clinical trials,in order to show whether they are not less effective than homologous schemes already established. This is achieved through comparative evaluation of their immunogenicity, efficacy and reactogenicity with studies considering implementation possibilities, adaptiveness and response to real life situations.
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Prevention
- Masking
- None
Eligibility Criteria
- Ages
- 18 Years to — (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- Yes
Inclusion Criteria
- •18 years of age or older, vaccinated with 1 dose of Sputnik V, AstraZeneca or Sinopharm vaccine up to 60 days prior to enrollment (according to the platform of the vaccine received as the first dose) or not vaccinated for the mRNA-1273 / mRNA-1273 Arm
- •With and without identified risk factors for COVID-19
- •Signature of the informed consent
- •Remain in the jurisdiction where your study began until the end of it
- •Be able to understand and sign the informed consent
Exclusion Criteria
- •Patients with immunocompromise due to underlying disease or immunosuppressive treatment
- •Pregnant and breastfeeding people
- •Being registered in the National Health Surveillance System for having suffered COVID-19 (symptomatic or asymptomatic) or having a positive IgG result in nucleocapsid ELISA in the sample taken on "DAY 0" for people who had received Sputnik-V or AstraZeneca as the first dose
- •Having had a severe allergic reaction (anaphylaxis) to any vaccine
Outcomes
Primary Outcomes
Antibody against Spike protein measurement by ELISA test
Time Frame: 28 days
To assess IgG anti Spike response (UI/ml): To assess the antibody concentration in each arm by ELISA COVIDAR IgG expressed in IU/ml. To determine whether a heterologous vaccination regimen is non-inferior to that observed with currently used homologous regimens.
Incidence of adverse events by measurement of the number of reactions after vaccination
Time Frame: 28 days
Adverse events events presumably attributable to vaccination and immunization (ESAVI) and adverse events of special interest (AESI)
Secondary Outcomes
- Neutralising Antibody against Spike protein and cellular immune response(6 month)
- Incidence of adverse events by measurement of the number of reactions after vaccination(6 months)
Investigators
Marina Pasinovich, md
Medical adviser on immunizations, Undersecretary of Health Strategies
Ministry of Public Health, Argentina