- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05710783
Phase II/III Study of the AVX/COVID-12 Vaccine Against COVID-19 Applied as a Booster.
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
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
General objective:
To demonstrate immunogenicity and safety of the AVX/COVID-12 vaccine (108.0 EID50/dose) as a single intramuscular booster shot in previously vaccinated subjects and prove non-inferiority producing neutralizing antibodies anti-COVID-19 from 14 days after administration in comparison to the active control, whose efficacy has been formerly established in a placebo-controlled clinical study.
Primary objective:
Phase II:
To demonstrate immunogenicity of the AVX/COVID-12 vaccine (108.0 EID50/dose) as a single intramuscular booster shot to increase levels of Spike protein to ACE2 binding-inhibitory antibodies, as well as to increase titres of neutralizing antibodies anti-COVID-19 from 14 days after vaccine administration.
Phase III:
To demonstrate non-inferiority of the AVX/COVID-12 vaccine (108.0 EID50/dose) as a single intramuscular booster shot for seroconversion and production of neutralizing antibodies anti-COVID-19 from 14 days after vaccine administration compared to active control, whose efficacy has been formerly established in a placebo-controlled clinical study.
Secondary objectives:
Phase II:
To evaluate the extent of the increase in the neutralizing titres after 0, 14, 90 and 180 days of administration of the AVX/COVID-12 vaccine (108.0 EID50/dose) as a single intramuscular booster shot.
To evaluate production of interferon-gamma by peripheral blood T lymphocytes in response to the Spike protein or its derivatives peptides stimulation following 0, 14, 90 and 180 days of administration of the AVX/COVID-12 vaccine (108.0 EID50/dose) as a single intramuscular booster shot in a subgroup of subjects randomly selected among the study population.
To compare production of interferon-gamma by peripheral blood T lymphocytes in response to the Spike protein or its derivatives peptides stimulation following 0, 14, 90 and 180 days of administration of the AVX/COVID-12 vaccine (108.0 EID50/dose) as a single intramuscular booster shot in a subgroup of subjects randomly selected among the study population to production in subjects vaccinated with active control.
Phase III:
To document the incidence of symptomatic COVID-19 disease cases in both groups (experimental vaccine and active control) from 14 days after administration.
To document the incidence of severe or mortality COVID-19 disease cases in both groups (experimental vaccine and active control) from 14 days after administration.
Safety objective (primary):
Both Phases:
To evaluate safety of AVX/COVID-12 vaccine immunization as a single intramuscular booster shot in comparison to the active control.
Exploratory objectives:
Phase II:
To evaluate the extent of the increase in following neutralizing titres 0, 14, 90 and 180 days of administration of the AVX/COVID-12 vaccine (108.0 EID50/dose) as a single intramuscular booster shot as per the history of immunization/infection at the time of enrolment.
To evaluate the neutralizing capacity of anti-SARS-CoV-2 antibodies gained following 0, 14, 90 and 180 days of administration of the AVX/COVID-12 vaccine (108.0 EID50/dose) as a single intramuscular booster shot in neutralization tests of pseudovirus expressing Spike proteins derived from SARS-CoV-2 variants of concern.
To evaluate production of cytokines by peripheral blood T lymphocytes in response to the Spike protein or its derivatives (peptides) stimulation following 0, 14, 90 and 180 days of administration of the AVX/COVID-12 vaccine (108.0 EID50/dose) as a single intramuscular booster shot in a subgroup of subjects randomly selected among the population study.
To compare production of cytokines by peripheral blood T lymphocytes in response to the Spike protein or its derivatives (peptides) stimulation following 0, 14, 90 and 180 days of administration of the AVX/COVID-12 vaccine (108.0 EID50/dose) as a single intramuscular booster shot in a subgroup of subjects randomly selected among the population study to production in subjects vaccinated with active control.
Phase III:
To compare geometric means of neutralizing titres after AVX/COVID-12 (108.0 EID50/dose) vaccination as a single intramuscular booster shot in the following active-controlled subgroups:
- Subjects younger than 65 years.
- Subjects older than 65 years.
- Subjects with at least one comorbidity (any).
- Subjects with obesity (BMI >30).
- Subjects with Diabetes Mellitus.
- Subjects with hypertension.
- Subjects with smoking history.
- Subjects with asthma.
- Subjects with cardiovascular disease.
- Subjects with chronic obstructive pulmonary disease.
- Subjects with chronic renal disease.
- Subjects with liver disease.
- Subjects with cancer history.
Clinical trial hypothesis:
Phase II:
In subjects with prior anti-SARS-CoV-2 vaccination longer than 4 months ago, 14 days after intramuscular administration of the AVX/COVID-12 vaccine, ≥80% of the subjects showed an inhibitory capacity of the receptor-binding domain (spike protein binds to ACE2) above 95% and levels of neutralizing titres statistically greater than baseline tires (vaccination day).
Phase III:
Immunogenicity assessed as seroconversion rate and production of neutralizing antibodies after administration of the AVX/COVID-12 vaccine as a single intramuscular booster shot of 108.0 EID50/dose showed non-inferiority to active control from 14 days after administration.
Justification of the product use in clinical research.
Nonclinical studies and Phase I clinical study have shown safety of the AVX/COVID-12 vaccine by intramuscular route. Signs of immunogenicity in several animals are clear. Evaluation of the immune response in healthy volunteers in the Phase I clinical study after administration of the vaccine by intramuscular route as a single dose of 108.0 EID50/dose showed immunogenicity of the vaccine. Partial reports from a Phase II boosting study in subjects with low levels of immunity at the time of enrolment strongly suggest the vaccine is safe and immunogenic in this population. Altogether, these data justify the continuation of the AVX/COVID-12 vaccine development program. Due to the advanced stage of the pandemics and vaccination programs worldwide, it is important to assess the capacity of the AVX/COVID-12 vaccine to boost the pre-existing immunity in open previously vaccinated population.
Study design:
A phase II/III parallel, double-blind, active-controlled, non-inferiority study to evaluate immunogenicity and safety of a booster immunization scheme with 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.
Summarised description of Phase II design:
Subjects who meet the study inclusion and not exclusion criteria shall be randomised (1:1) to receive the AVX/COVID-12 vaccine or active control.
From the first 400 subjects of study samples corresponding to the efficacy criteria for Phases II and III shall be collected (including samples to determine cell response in a randomly-defined subgroup).
If at the end of the main endpoint assessment of the study phase corresponding to Phase II (day 14) it is determined the intervention with AVX-COVID-12 vaccine did not meet the specified objective (i. e., neutralizing capacity above 95% was not showed in 80% of the population vaccinated in surrogate testing and a significant change when comparing the geometric means of population neutralizing antibodies titres from days 0 to 14) the enrolment shall be stopped in order to meet the criteria related to the Phase III objectives, otherwise the enrolment shall continue consecutively.
Additionally, the first 400 subjects enrolled (corresponding to Phase II (200 vaccinated with the experimental vaccine and 200 with the active control)) shall be evaluated 90 and 180 days after vaccination to determine the humoral immune response performance at these moments.
A sub-sample of 100 subjects randomly selected (50 experimental vaccine and 50 active control) shall be evaluated regarding cell-mediated immune response in addition to the humoral response at the time of enrolment and 14, 90 and 180 days after vaccination.
Comparison of the safety evaluation related to Phase II shall be carried out with the population receiving active control as reference.
An interim futility analysis shall be carried out for non-inferiority criteria of Phase III at the end of enrolment corresponding to Phase II by Fleming-alpha spending function.
Summarised description of Phase III design:
In total 3832 subjects shall be enrolled divided into 3000 subjects to receive the experimental vaccine (2168 + 832 (632 Phase III + 200 from Phase II/III)) and 832 subjects (632 Phase II + 200 from Phase II/III) will receive active control.
The first 1664 subjects enrolled shall be randomised 1:1 to receive the experimental vaccine or active control and at the end of this phase the subsequent number of subjects enrolled shall receive only the experimental vaccine up to 3000 subjects.
From the first 1664 subjects of study (832 randomised to receive the experimental vaccine and 832 vaccinated with active control) samples shall be collected on days 0 and 14 to determine total titres of anti-S IgG, total titres of anti-N IgG and anti-SARS-CoV-2 neutralizing titres.
Three thousand subjects from safety population and 832 subjects vaccinated with active control shall be followed-up to 180 days to detect symptomatic cases of COVID-19 proved with genetic material detection from nasal/mouth mucus by PCR.
Study Type
Enrollment (Actual)
Phase
- Phase 2
- Phase 3
Contacts and Locations
Study Contact
- Name: Gustavo Peralta
- Phone Number: 54450460
- Email: gustavo.peralta@avimex.com.mx
Study Locations
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Aguascalientes, Mexico, 20230
- Promotora Médica Aguascalientes, S.A. de C.V.
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Oaxaca, Mexico, 68000
- Oaxaca Site Management Organization, S.C.
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Veracruz, Mexico, 91855
- Profesionales Médicos Desarrollados, S.C. (Instituto Veracruzano de Investigación Clínica)
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Cdmx
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Mexico City, Cdmx, Mexico, 06760
- CAIMED Investigación en Salud S.A. de C.V.
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Ciudad De México
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Coyoacán, Ciudad De México, Mexico, 04100
- Centro de Investigacion Clinica Chapultepec S.A. de C.V.
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Gustavo A Madero, Ciudad De México, Mexico, 07760
- Unidad de Medicina Familiar No. 20 - IMSS
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Gustavo A. Madero, Ciudad De México, Mexico, 07369
- Centro de Investigación Clinica Acelerada, S.C.
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Estado De México
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Tlalnepantla, Estado De México, Mexico, 54055
- Clinical Research Institute S.C.
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Guerrero
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Acapulco, Guerrero, Mexico, 39670
- Centro de Investigacion Clinica del Pacifico, S.A. de C.V.
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Michoacán
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Morelia, Michoacán, Mexico, 58260
- Sociedad Administradora de Servicios de Salud, S.C.
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Quintana Roo
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Cancún, Quintana Roo, Mexico, 77506
- Centro de Investigación y Avances Médicos Especializados / RED OSMO Cancún
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Yucatán
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Mérida, Yucatán, Mexico, 97070
- Centro Multidisciplinario para el Desarrollo Especializado de la Investigacion Clinica en Yucatan S.C.P.
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Mérida, Yucatán, Mexico, 97070
- Jules Bordet Medical Service, S.C.P. / Khöler & Milstein Research
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Mérida, Yucatán, Mexico, 97070
- Unidad de Atención Médica e Investigación en Salud, S.C.P.
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- People ≥18 years old.
- Any genre.
- Have received their informed consent.
- Negative PCR test for SARS-CoV-2 during the screening visit.
- Negative pregnancy test in women with child-bearing potential.
- Commitment to maintain adequate prevention measures to avoid contagion by SARS-CoV-2 throughout their participation in the study considering their strict following for the first 14 days after the baseline visit (use of face masks in closed places, social distancing measures in open spaces and frequent handwashing).
- Have been vaccinated with any of the approved vaccines against SARS-CoV-2 (at least once).
Exclusion Criteria:
- History of hypersensibility or allergy to any of the vaccine compounds.
- History of severe anaphylactic reactions of any cause.
- Fever at the baseline visit.
- Active participation in any other clinical trial or experimental intervention within last 3 months.
- Have received any vaccine (experimental or approved) within 30 days before baseline visit, except for influenza vaccine.
- The last anti-COVID vaccination was less than 4 months ago.
- SARS-CoV-2 infection occurred in less than 1 month ago.
- Pregnant or nursing women.
- Child-bearing potential and sexually active women who do not use highly effective birth control methods (oral contraceptives, intrauterine device, subcutaneous implant, transdermal patch used at least within 3 months) at the time of enrolment. Fertile and sexually active men not willing to strictly use (in all relationships) barrier methods of birth control throughout study. Those participants (both sexes) not sexually active can participate in the study if they are committed to avoid sexual intercourse throughout study (6 months).
- Chronic diseases that require use of immunosuppressive agents or immune response modulators (for instance: systemic corticosteroids, cyclosporine, rituximab, among others).
- Cancer under active chemotherapy treatment.
- Subjects with HIV infection history.
- Subjects with chronic renal or liver disease who have shown an infectious condition that required hospitalization or treatment with intravenous drugs within the last year prior baseline visit.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Prevention
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Triple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Phase II - Experimental
AVX-COVID/12 Dose: 10^8.0
EID50/ intramuscular dose Study parameters: Safety, Serological response, Cellular response
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Single dose IM administration of a Recombinant Newcastle Disease Virus Vectored Vaccine for SARS-CoV-2
Other Names:
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Active Comparator: Phase II - Active Control
ChAdOx-1-S[recombinant]) intramuscular Study parameters: Safety, Serological response, Cellular response
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Single dose IM administration of ChAdOx1 nCOV-19 (Astra-Zeneca) adenovirus-vectored vaccine
Other Names:
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Experimental: Phase III - Experimental
AVX-COVID/12 Intramuscular Dose: 10^8.0
EID50/ intramuscular dose Study parameters: Safety, Serological response
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Single dose IM administration of a Recombinant Newcastle Disease Virus Vectored Vaccine for SARS-CoV-2
Other Names:
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Active Comparator: Phase III - Active Control
ChAdOx-1-S[recombinant]) intramuscular Study parameters: Safety, Serological response
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Single dose IM administration of ChAdOx1 nCOV-19 (Astra-Zeneca) adenovirus-vectored vaccine
Other Names:
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Experimental: Phase III - Security
AVX-COVID/12 Intramuscular Dose: 10^8.0
EID50/ intramuscular dose Study parameters: Safety.
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Single dose IM administration of a Recombinant Newcastle Disease Virus Vectored Vaccine for SARS-CoV-2
Other Names:
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Experimental: Phase II- Experimental
AVX-COVID/12 Dose: 10^8.0
EID50/ intramuscular dose Study parameters: Safety, Serological response.
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Single dose IM administration of a Recombinant Newcastle Disease Virus Vectored Vaccine for SARS-CoV-2
Other Names:
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Active Comparator: Phase II- Active Control
ChAdOx-1-S[recombinant]) intramuscular Study parameters: Safety, Serological response.
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Single dose IM administration of ChAdOx1 nCOV-19 (Astra-Zeneca) adenovirus-vectored vaccine
Other Names:
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Phase II - Increase in titres of neutralizing anti SARS-CoV-2 IgG antibodies in serum
Time Frame: 14 to 17 days after vaccination
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Serum IgG, neutralizing antibodies
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14 to 17 days after vaccination
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Phase II - T-cell elicited responses
Time Frame: Day 14
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Percentage of cells expressing IL2, TNF-alpha and IFN-gamma by Flow cytometry after challenge with spike protein.
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Day 14
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Phase III - Increase in titres of neutralizing anti SARS-CoV-2 IgG antibodies in serum
Time Frame: 14 to 17 days after vaccination
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Serum IgG, neutralizing antibodies
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14 to 17 days after vaccination
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Phase II - Increase in titres of neutralizing anti SARS-CoV-2 IgG antibodies in serum
Time Frame: Day 0 (day of vaccination)
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Serum IgG, neutralizing antibodies
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Day 0 (day of vaccination)
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Phase II - Increase in titres of neutralizing anti SARS-CoV-2 IgG antibodies in serum
Time Frame: Day 90 after vaccination
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Serum IgG, neutralizing antibodies
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Day 90 after vaccination
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Phase II - Increase in titres of neutralizing anti SARS-CoV-2 IgG antibodies in serum
Time Frame: Day 180 after vaccination
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Serum IgG, neutralizing antibodies
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Day 180 after vaccination
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Phase II - T-cell elicited responses
Time Frame: Day 0 (day of vaccination)
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Percentage of cells expressing IL2, TNF-alpha and IFN-gamma by Flow cytometry after challenge with spike protein.
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Day 0 (day of vaccination)
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Phase II - T-cell elicited responses
Time Frame: Day 90 after vaccination
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Percentage of cells expressing IL2, TNF-alpha and IFN-gamma by Flow cytometry after challenge with spike protein.
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Day 90 after vaccination
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Phase II - T-cell elicited responses
Time Frame: Day 180 after vaccination
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Percentage of cells expressing IL2, TNF-alpha and IFN-gamma by Flow cytometry after challenge with spike protein.
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Day 180 after vaccination
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Phase III - Incidence of symptomatic COVID-19 disease cases
Time Frame: From 14 days after vaccination
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Document the incidence of COVID-19 disease symptomatic cases in both groups (experimental vaccine and active control).
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From 14 days after vaccination
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Phase III - Incidence of severe COVID-19 disease cases or mortality
Time Frame: From 14 days after vaccination
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Document the incidence of severe or mortality COVID-19 disease cases in both groups (experimental vaccine and active control).
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From 14 days after vaccination
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Other Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Phase II/Phase III - Safety: Adverse Events
Time Frame: After Day 14 after vaccination
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Incidence of adverse events
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After Day 14 after vaccination
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Phase II -Basal titers of Anti-N and anti-S antibodies, distribution of anti-N and anti-S antibodies within study population
Time Frame: Day 0 (day of vaccination)
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Appearance of anti-N and anti-S antibodies
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Day 0 (day of vaccination)
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Phase II - Increase in titers of Anti-N and anti-S antibodies, distribution of anti-N and anti-S antibodies within study population
Time Frame: Day 14 after vaccination
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Appearance of anti-N and anti-S antibodies
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Day 14 after vaccination
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Phase II - Increase in titers of Anti-N and anti-S antibodies, distribution of anti-N and anti-S antibodies within study population
Time Frame: Day 90 after vaccination
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Appearance of anti-N and anti-S antibodies
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Day 90 after vaccination
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Phase II - Increase in titers of Anti-N and anti-S antibodies, distribution of anti-N and anti-S antibodies within study population
Time Frame: Day 180 after vaccination
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Appearance of anti-N and anti-S antibodies
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Day 180 after vaccination
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Phase II - Incidence of confirmed cases of SARS-CoV-2 infection
Time Frame: Day 28 until the end of the study.
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Evaluation of the incidence of confirmed cases of SARS-CoV-2 infection in study subjects from systematic vaccination.
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Day 28 until the end of the study.
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Increase in titres of neutralizing anti SARS-CoV-2 IgG antibodies in serum in selected subpopulations
Time Frame: From 14 and up to 180 days after vaccination
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Subjects younger than 65 years. Subjects older than 65 years. Subjects with at least one comorbidity (any). Subjects with obesity (BMI >30). Subjects with Diabetes Mellitus. Subjects with hypertension. Subjects with smoking history. Subjects with asthma. Subjects with cardiovascular disease. Subjects with chronic obstructive pulmonary disease. Subjects with chronic renal disease. Subjects with liver disease. Subjects with cancer history. |
From 14 and up to 180 days after vaccination
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Collaborators and Investigators
Collaborators
Investigators
- Study Director: Gustavo Peralta, Laboratorio Avi-Mex, S.A. de C.V.
Publications and helpful links
General Publications
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- Logunov DY, Dolzhikova IV, Zubkova OV, Tukhvatullin AI, Shcheblyakov DV, Dzharullaeva AS, Grousova DM, Erokhova AS, Kovyrshina AV, Botikov AG, Izhaeva FM, Popova O, Ozharovskaya TA, Esmagambetov IB, Favorskaya IA, Zrelkin DI, Voronina DV, Shcherbinin DN, Semikhin AS, Simakova YV, Tokarskaya EA, Lubenets NL, Egorova DA, Shmarov MM, Nikitenko NA, Morozova LF, Smolyarchuk EA, Kryukov EV, Babira VF, Borisevich SV, Naroditsky BS, Gintsburg AL. Safety and immunogenicity of an rAd26 and rAd5 vector-based heterologous prime-boost COVID-19 vaccine in two formulations: two open, non-randomised phase 1/2 studies from Russia. Lancet. 2020 Sep 26;396(10255):887-897. doi: 10.1016/S0140-6736(20)31866-3. Epub 2020 Sep 4. Erratum In: Lancet. 2021 Jan 9;397(10269):98.
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Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- AVX-SARS-CoV-2-VAC-005
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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