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COVID-19 Vaccine, Inactivated, Omicron Strain

Phase 3

COVID-19 | Monoclonal antibody | Infectious Disease |Sinovac Biotech, Ltd|Last Updated: May 31, 2024

Target and mechanism

ModalityMonoclonal antibody

Also known as COVID-19 Vaccine (Vero Cell), Inactivated, Omicron Strain, COVID-19 Vaccine (Vero cell), Inactivated (Omicron variant), COVID-19 Vaccine, Inactivated, COVID-19 Vaccine,Inactivated

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindCONTROLLED
Total Trials3
Total Enrollment2,971

FDA Designations

No designations recorded

Clinical trial landscape

COVID-19 Vaccine, Inactivated, Omicron Strain · 3 trials · 1 indication

Phase 3 2Phase 2 1
NCT05381350Immunogenicity and Safety of Booster Immunization of COVID-19 Vaccine (Vero Cell), Inactivated (Omicron Variant) in Healthy People Aged 18 Years and AboveCOVID-19
COMPLETED1,750 Analytics
NCT05137418Safety and Immunogenicity of COVID-19 Vaccine, Inactivated in Healthy Population Aged From 3 to 11 YearsCOVID-19
COMPLETED1,000 Analytics
PHASE3COMPLETED
Immunogenicity and Safety of Booster Immunization of COVID-19 Vaccine (Vero Cell), Inactivated (Omicron Variant) in Healthy People Aged 18 Years and Above
COVID-19Unlock trial analytics
PHASE3COMPLETED
Safety and Immunogenicity of COVID-19 Vaccine, Inactivated in Healthy Population Aged From 3 to 11 Years
COVID-19Unlock trial analytics

Study Endpoints

Primary Endpoints

Geometric mean titres (GMTs) and seroconversion rates of the neutralizing antibody to SARS-CoV-2 Omicron strain (BA.1)
28 days (Day 28) after booster vaccination

Geometric mean titres (GMTs) and seroconversion rates of the neutralizing antibody to SARS-CoV-2 Omicron strain (BA.1), induced by a booster dose of COVID-19 vaccine (Omicron variant), 28 days (Day 28) after booster vaccination among subjects with two- or three-dose COVID-19 vaccine(CZ strain) ≥6 months before

GMTs and seroconversion rates of the neutralizing antibody to SARS-CoV-2 Omicron strain (BA.1)
28 days (Day 28) after booster vaccination

GMTs and seroconversion rates of the neutralizing antibody to SARS-CoV-2 Omicron strain (BA.1), induced by a booster dose of Prototype COVID-19 vaccine, 28 days (Day 28) after booster vaccination among subjects with three-dose Prototype COVID-19 vaccine≥6 months before

GMTs of the neutralizing antibody to SARS-CoV-2 Prototype strain(CZ strain)
28 days after vaccination of two doses of Prototype COVID-19 vaccine

GMTs of the neutralizing antibody to SARS-CoV-2 Prototype strain induced by two doses of Prototype COVID-19 vaccine, 28 days after vaccination in previous clinical trial serums

Immunogenicity index-the GMT of neutralizing antibodies
28 days after the second vaccination

The GMT of neutralizing antibodies 28 days after the second vaccination.

Geometric mean of neutralization antibody titre (GMT)
Day 14 after the last booster dose

Geometric mean of neutralization antibody titre (GMT) on Day 14 after the last booster dose against the Omicron variant in different groups

Occurrence, intensity, duration, and relationship of solicited local and systemic AEs
28 days post booster vaccination

Occurrence, intensity, duration, and relationship of solicited local and systemic AEs for 7 days following each booster dose vaccination and of unsolicited AEs for 28 days post booster vaccination

Secondary Endpoints

Geometric mean increases (GMIs) and seropositive rates of the neutralizing antibody to SARS-CoV-2 Omicron strain (BA.1), as well as GMTs, GMIs, seroconversion rates and seropositive rates of the neutralizing antibody to SARS-CoV-2 Omicron strain (BA.2)
28 days (Day 28) after booster vaccination
GMIs,seroconversion rates seropositive rates of the neutralizing antibody to SARS-CoV-2 Omicron strain (BA.1), as well as GMTs, GMIs, seroconversion rates and seropositive rates of the neutralizing antibody to SARS-CoV-2 Omicron strain (BA.2)
28 days (Day 28) after booster vaccination
GMTs, GMIs, seroconversion rates and seropositive rates of the neutralizing antibody to SARS-CoV-2 Omicron strain (BA.1, BA.2), Prototype strain and Delta strain
28 days (Day 28) after booster vaccination
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
Experimental group aged 18-59 years and received 2 doses of COVID-19 vaccine(CZ strain)EXPERIMENTAL400 participants aged 18-59 years and received 2 doses of COVID-19 vaccine(CZ strain) will receive one dose of inactivated COVID-19 vaccine (Omicron variant).
Control Group aged 18-59 years and received 2 doses of COVID-19 vaccine(CZ strain)ACTIVE_COMPARATOR200 participants aged 18-59 years and received 2 doses of COVID-19 vaccine(CZ strain) will receive one dose of inactivated COVID-19 vaccine(CZ strain).
Experimental group aged 60 years and above and received 2 doses of COVID-19 vaccine(CZ strain)EXPERIMENTAL100 participants aged 60 years and above and received 2 doses of COVID-19 vaccine(CZ strain) will receive one dose of inactivated COVID-19 vaccine (Omicron variant).
Control Group aged 60 years and above and received 2 doses of COVID-19 vaccine(CZ strain)ACTIVE_COMPARATOR50 participants aged 60 years and above and received 2 doses of COVID-19 vaccine(CZ strain) will receive one dose of inactivated COVID-19 vaccine(CZ strain).
Experimental group aged 18-59 years and received 3 doses of COVID-19 vaccine(CZ strain)EXPERIMENTAL400 participants aged 18-59 years and received 3 doses of COVID-19 vaccine(CZ strain) will receive one dose of inactivated COVID-19 vaccine (Omicron variant).
Control Group aged 18-59 years and received 3 doses of COVID-19 vaccine(CZ strain)ACTIVE_COMPARATOR200 participants aged 18-59 years and received 3 doses of COVID-19 vaccine(CZ strain) will receive one dose of inactivated COVID-19 vaccine(CZ strain).
Experimental group aged 60 years and above and received 3 doses of COVID-19 vaccine(CZ strain)EXPERIMENTAL100 participants aged 60 years and above and received 3 doses of COVID-19 vaccine(CZ strain) will receive one dose of inactivated COVID-19 vaccine (Omicron variant).
Control Group aged 60 years and above and received 3 doses of COVID-19 vaccine(CZ strain)ACTIVE_COMPARATOR50 participants aged 60 years and above and received 3 doses of COVID-19 vaccine(CZ strain) will receive one dose of inactivated COVID-19 vaccine(CZ strain).
Historical control groupACTIVE_COMPARATORBackup serum samples will be selected from 250 healthy adult subjects aged 26-45 years who received two doses of inactivated COVID-19 vaccine(CZ strain)from clinical trial of lot-to-lot consistency of an inactivated SARS-CoV-2 Vaccine(Pro-NCOV-4001) to detect neutralizing antibodies against the CZ, Delta and Omicron strains.
3-5 years old age groupEXPERIMENTAL500 participants aged 3-5 years will receive two doses of COVID-19 vaccine,inactivated on day 0 and day 28.
6-11 years old age groupEXPERIMENTAL500 participants aged 6-11 years will receive two doses of COVID-19 vaccine,inactivated on day 0 and day 28.
Arm 1 (1 dose Omicron Vaccine arm, mRNA vaccine group)EXPERIMENTAL75 participants who have completed two/three doses of mRNA vaccine (prior to this study) will receive one dose COVID-19 Vaccine (Vero Cell), Inactivated, Omicron Strain(1200 SOU).
Arm 2 (2 doses Omicron Vaccine arm, mRNA vaccine group)EXPERIMENTAL75 participants who have completed two/three doses of mRNA vaccine (prior to this study) will receive two doses COVID-19 Vaccine (Vero Cell), Inactivated, Omicron Strain (0,28 days)(1200 SOU).
Arm 3 (1 dose Omicron Vaccine arm, CoronaVac® group)EXPERIMENTAL75 participants who have completed two/three doses of CoronaVac®(prior to this study) will receive one dose COVID-19 Vaccine (Vero Cell), Inactivated, Omicron Strain (1200 SOU).
Arm 4 (2 doses Omicron Vaccine arm, CoronaVac® group)EXPERIMENTAL75 participants who have completed two/three doses of CoronaVac®(prior to this study) will receive two doses COVID-19 Vaccine (Vero Cell), Inactivated, Omicron Strain (0,28 days)(1200 SOU).

Interventions

NameTypeDescription
COVID-19 Vaccine (Vero cell), Inactivated (Omicron variant)BIOLOGICALThe COVID-19 Vaccine (Vero cell), Inactivated (Omicron variant)was manufactured by Sinovac Research\& Development Co., Ltd.1200SOU inactivated SARS-CoV-2 Omicron strain in 0.5ml of aluminium hydroxide solution per injection.
COVID-19 Vaccine (Vero cell), Inactivated (CZ strain)BIOLOGICALThe COVID-19 vaccine,inactivated was manufactured by Sinovac Research\& Development Co., Ltd.600SU inactivated SARS-CoV-2 CZ strain virus in 0.5 mL of aluminium hydroxide solution per injection.
COVID-19 Vaccine,InactivatedBIOLOGICALThe COVID-19 vaccine,inactivated was manufactured by Sinovac Research\& Development Co., Ltd..600SU Inactivated SARS-COV-2 virus in 0·5 mL of aluminium hydroxide solution per injection
COVID-19 Vaccine (Vero Cell), Inactivated, Omicron StrainBIOLOGICALThe COVID-19 vaccine (Vero cell), Inactivated, Omicron Strain was developed by Sinovac Life Science Ltd.The product is a pre-filled syringe or a vial with an extractable volume of 0.5 mL. The antigen content is 1200 SOU/0.5 mL (6 µg/0.5 mL).
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: * Healthy adults aged 18 years and above; * Subjects completed two doses of the prototype COVID-19 vaccine (CZ strain)(the interval between the first dose and the second dose was 1-2 months)or completed 3 doses of prototype COVID-19 vaccine (CZ strain)over 6 months (the interval...

Countries:China
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Frequently asked questions about COVID-19 Vaccine, Inactivated, Omicron Strain

What is COVID-19 Vaccine, Inactivated, Omicron Strain?

COVID-19 Vaccine, Inactivated, Omicron Strain is an investigational vaccine developed by Sinovac Biotech, Ltd for prevention of COVID-19. It is an inactivated vaccine designed against the Omicron variant of SARS-CoV-2. It has been studied as a booster immunization in healthy adults aged 18 years and above, and the clinical program includes three completed trials.

Who makes COVID-19 Vaccine, Inactivated, Omicron Strain?

COVID-19 Vaccine, Inactivated, Omicron Strain is developed by Sinovac Biotech, Ltd, which trades under the ticker SVA. Sinovac is the sponsor of the clinical trials evaluating this inactivated Omicron-strain vaccine candidate for COVID-19.

What phase is COVID-19 Vaccine, Inactivated, Omicron Strain in?

COVID-19 Vaccine, Inactivated, Omicron Strain has been evaluated in Phase 3 clinical trials, and all three of its listed trials are completed. It is an investigational vaccine candidate and is not described as approved. The program includes one Phase 2 trial and two Phase 3 trials, with no trials currently active.

What clinical trials is COVID-19 Vaccine, Inactivated, Omicron Strain in?

Three completed trials have evaluated this vaccine. NCT05381350 was a Phase 3 immunogenicity and safety study of booster immunization in healthy people aged 18 years and above, enrolling 1,750 participants in China. NCT05411471 was a Phase 2 booster study with 221 participants, and NCT05137418 was a Phase 3 study in healthy people aged 3 to 11 years with 1,000 participants.

Is COVID-19 Vaccine, Inactivated, Omicron Strain the same as COVID-19 Vaccine (Vero Cell), Inactivated, Omicron Strain?

Yes. COVID-19 Vaccine, Inactivated, Omicron Strain is also known as COVID-19 Vaccine (Vero Cell), Inactivated, Omicron Strain, COVID-19 Vaccine (Vero cell), Inactivated (Omicron variant), and COVID-19 Vaccine, Inactivated. These names refer to the same Sinovac inactivated COVID-19 vaccine candidate targeting the Omicron strain.

How many participants were enrolled in trials of COVID-19 Vaccine, Inactivated, Omicron Strain?

Across its three completed clinical trials, COVID-19 Vaccine, Inactivated, Omicron Strain enrolled a total of 2,971 participants. The trials were randomized, double-blind, and controlled, and all were conducted in China. Participants included healthy volunteers, with ages ranging from 3 years and above depending on the study.