Immunogenicity and Safety Study of One Booster Dose of Trivalent COVID-19 Vaccine (Vero Cell), Inactivated

• ClinicalTrials.gov Identifier: NCT05433272
• Recruitment Status: Not yet recruiting
• First Posted: June 27, 2022
• Last Update Posted: January 12, 2023
• Sponsor: Sinovac Biotech (Colombia) S.A.S.
• Collaborator: Sinovac Life Sciences Co., Ltd.
• Information provided by (Responsible Party): Sinovac Biotech Co., Ltd ( Sinovac Biotech (Colombia) S.A.S. )

Tracking Information

• First Submitted Date: June 21, 2022
• First Posted Date: June 27, 2022
• Last Update Posted Date: January 12, 2023
• Estimated Study Start Date: August 10, 2023
• Estimated Primary Completion Date: September 10, 2023 (Final data collection date for primary outcome measure)

Current Primary Outcome Measures (submitted: June 23, 2022)

• Geometric Mean Titer (GMT) of the neutralizing antibody to SARS-CoV-2 Delta strain and Omicron strain [ Time Frame: At 14 days after one booster dose ]
  Geometric Mean Titer (GMT) of the neutralizing antibody to SARS-CoV-2 Delta strain and Omicron strain at 14 days after one booster dose of trivalent COVID-19 vaccine or CoronaVac
• Seroconversion rate of the neutralizing antibody to SARS-CoV-2 Delta strain and Omicron strain [ Time Frame: At 14 days after one booster dose ]
  Seroconversion rate of the neutralizing antibody to SARS-CoV-2 Delta strain and Omicron strain at 14 days after one booster dose of trivalent COVID-19 vaccine or CoronaVac
• GMT of the neutralizing antibody to SARS-CoV-2 Prototype strain [ Time Frame: At 14 days after one booster dose ]
  GMT of the neutralizing antibody to SARS-CoV-2 Prototype strain at 14 days after one booster dose of trivalent COVID-19 vaccine or CoronaVac.
• Seroconversion rate of the neutralizing antibody to SARS-CoV-2 Prototype strain [ Time Frame: At 14 days after one booster dose ]
  Seroconversion rate of the neutralizing antibody to SARS-CoV-2 Prototype strain at 14 days after one booster dose of trivalent COVID-19 vaccine or CoronaVac.

• Original Primary Outcome Measures: Same as current

Current Secondary Outcome Measures (submitted: June 23, 2022)

• Seropositive rate of the neutralizing antibody to SARS-CoV-2 Delta strain and Omicron strain [ Time Frame: At 14 days after one booster dose ]
  Seropositive rate of the neutralizing antibody to SARS-CoV-2 Delta strain and Omicron strain at 14 days after one booster dose of trivalent COVID-19 vaccine or CoronaVac.
• Geometric Mean Fold Rise (GMFR) of the neutralizing antibody to SARS-CoV-2 Delta strain and Omicron strain [ Time Frame: At 14 days after one booster dose ]
  Geometric Mean Fold Rise (GMFR) of the neutralizing antibody to SARS-CoV-2 Delta strain and Omicron strain at 14 days after one booster dose of trivalent COVID-19 vaccine or CoronaVac
• Seropositive rate of the neutralizing antibody to SARS-CoV-2 Prototype strain [ Time Frame: At 14 days after one booster dose ]
  Seropositive rate of the neutralizing antibody to SARS-CoV-2 Prototype strain at 14 days after one booster dose of trivalent COVID-19 vaccine or CoronaVac
• GMFR of the neutralizing antibody to SARS-CoV-2 Prototype strain [ Time Frame: At 14 days after one booster dose ]
  GMFR of the neutralizing antibody to SARS-CoV-2 Prototype strain at 14 days after one booster dose of trivalent COVID-19 vaccine or CoronaVac.
• Occurrence, intensity, duration, and relationship of solicited local and systemic Adverse Reactions (ARs) [ Time Frame: Within 7 days after booster vaccination ]
  Occurrence, intensity, duration, and relationship of solicited local and systemic Adverse Reactions (ARs) within 7 days after booster vaccination.
• Occurrence, intensity, duration, and relationship of unsolicited ARs [ Time Frame: within 28 days after booster vaccination ]
  Occurrence, intensity, duration, and relationship of unsolicited ARs within 28 days after booster vaccination.
• Occurrence and relationship of Serious Adverse Events (SAEs) and Adverse Events of Special Interest (AESI) [ Time Frame: Within 6 months after booster vaccination ]
  Occurrence and relationship of Serious Adverse Events (SAEs) and Adverse Events of Special Interest (AESI) within 6 months after booster vaccination.

• Original Secondary Outcome Measures: Same as current

Current Other Pre-specified Outcome Measures (submitted: June 23, 2022)

• Seropositive rate of neutralizing antibody [ Time Frame: At 3 and 6 months after the booster dose ]
  Seropositive rate of neutralizing antibody to SARS-CoV-2 Prototype strain, Delta strain and Omicron strain at 3 and 6 months after the booster dose of trivalent COVID-19 vaccine or CoronaVac.
• GMT of neutralizing antibody [ Time Frame: At 3 and 6 months after the booster dose ]
  GMT of neutralizing antibody to SARS-CoV-2 Prototype strain, Delta strain and Omicron strain at 3 and 6 months after the booster dose of trivalent COVID-19 vaccine or CoronaVac.

• Original Other Pre-specified Outcome Measures: Same as current

Descriptive Information

• Brief Title: Immunogenicity and Safety Study of One Booster Dose of Trivalent COVID-19 Vaccine (Vero Cell), Inactivated
• Official Title: A Randomized, Double-Blind, Active-controlled Phase Ⅲ Clinical Trial to Evaluate the Immunogenicity and Safety of One Booster Dose of Trivalent COVID-19 Vaccine (Vero Cell), Inactivated in Healthy People in Colombia
• Brief Summary: This is a randomized, double-blind, active-controlled phase Ⅲ clinical trial.The purpose of this study is to evaluate the immunogenicity and safety of one booster dose of trivalent COVID-19 vaccine (vero cell), inactivated, prototype strain, delta strain and omicron strain in healthy people aged 3 years old and above and have completed two or three doses of CoronaVac® in Colombia.
• Detailed Description: This is a randomized, double-blind, and active-controlled Phase Ⅲ bridging clinical trial of 1,400 subjects aged 3 years and above and have completed two or three doses of CoronaVac at least 3 months prior to this study.After enrollment, subjects will be randomly assigned into 2 groups at a ratio of 1:1 to receive one dose of trivalent COVID-19 vaccine or CoronaVac®.
• Study Type: Interventional
• Study Phase: Phase 3
• Study Design: Allocation: Randomized; Intervention Model: Parallel Assignment; Masking: Double (Participant, Investigator); Primary Purpose: Prevention
• Condition: COVID-19

Intervention

• Biological: Trivalent COVID-19 Vaccine (Vero Cell), Inactivated, Prototype Strain, Delta Strain and Omicron Strain
  The Trivalent COVID-19 Vaccine (Vero Cell), Inactivated, Prototype Strain, Delta Strain and Omicron Strain was developed by Sinovac Life Science Ltd. The antigen content of trivalent COVID-19 vaccine is a total of 18μg/0.5 ml, including 1200 SU/6 µg/0.5 ml for Prototype strain, 1200 SDU/6 µg/0.5 ml for Delta strain, and 1200 SOU/6 µg/0.5 ml for Omicron strain. The routine of administration is Intramuscular injection into deltoid region.
  Other Name: Trivalent COVID-19 vaccine
• Biological: COVID-19 Vaccine (Vero Cell), Inactivated
  The COVID-19 Vaccine (Vero Cell),Inactivated was manufactured by Sinovac Life Science Ltd.The antigen content of the active-controlled vaccine (CoronaVac) is 600 SU/3 µg/0.5 ml.The routine of administration is Intramuscular injection into deltoid region.
  Other Name: CoronaVac®

Study Arms

• Experimental: Trial group of participants have received two doses of CoronaVac®
  400 participants have received two doses of CoronaVac® at least 3 months prior to this study ,including 150 participants aged 3-17 years old,125 participants aged 18-59 years old and 125 participants aged 60 years and above,will receive one booster dose of trivalent COVID-19 vaccine.
  Intervention: Biological: Trivalent COVID-19 Vaccine (Vero Cell), Inactivated, Prototype Strain, Delta Strain and Omicron Strain
• Active Comparator: Control group of participants have received two doses of CoronaVac®
  400 participants have received two doses of CoronaVac® at least 3 months prior to this study ,including 150 participants aged 3-17 years old,125 participants aged 18-59 years old and 125 participants aged 60 years and above,will receive one booster dose of CoronaVac®.
  Intervention: Biological: COVID-19 Vaccine (Vero Cell), Inactivated
• Experimental: Trial group of participants have received three doses of CoronaVac®
  300 participants have received three doses of CoronaVac® at least 3 months prior to this study ,including 150 participants aged 18-59 years old and 150 participants aged 60 years and above,will receive one booster dose of trivalent COVID-19 vaccine.
  Intervention: Biological: Trivalent COVID-19 Vaccine (Vero Cell), Inactivated, Prototype Strain, Delta Strain and Omicron Strain
• Active Comparator: Control group of participants have received three doses of CoronaVac®
  300 participants have received three doses of CoronaVac® at least 3 months prior to this study ,including 150 participants aged 18-59 years old and 150 participants aged 60 years and above,will receive one booster dose of CoronaVac®.
  Intervention: Biological: COVID-19 Vaccine (Vero Cell), Inactivated

• Publications *: Not Provided

Recruitment Information

• Recruitment Status: Not yet recruiting
• Estimated Enrollment (submitted: June 23, 2022): 1400
• Original Estimated Enrollment: Same as current
• Estimated Study Completion Date: September 10, 2023
• Estimated Primary Completion Date: September 10, 2023 (Final data collection date for primary outcome measure)

Eligibility Criteria

Inclusion Criteria:

• Healthy people aged 3 years and above who have completed two or three doses of CoronaVac at least 3 months (≥ 90 days) before (3-8 weeks interval for the first and second dose of CoronaVac, and ≥3 months interval for the second and third dose);
• Participants (and/or their legal guardians for pediatric population) are able to understand and sign the informed consent voluntarily;
• Pregnancy and contraception:

Female participants of childbearing potential (post-menarche and pre-menopause that has not been undergone any sterilization surgery), who have a negative pregnancy test on the day of booster vaccination in the present study, has practiced adequate contraception or has abstained from all activities that could result in pregnancy for at least 28 days prior to the day of vaccination, and agree to continue adequate contraception through 3 months following the booster vaccination and are not currently breastfeeding; Male participants of childbearing potential who agree to use adequate contraception through 3 months following the booster vaccination (and/or your female partner agree to use an acceptable method of birth control), which include refrain from donating sperm;

Note 1 :Adequate contraception is defined as consistent and correct use of an approved contraceptive method in accordance with the product label. For example:

• Barrier method (such as condoms, diaphragm, or cervical cap) used in conjunction with spermicide
• Intrauterine device
• Prescription hormonal contraceptive taken or administered via oral (pill), transdermal (patch), subdermal, or IM route

• Sterilization of a female participant's monogamous male partner prior to entry into the study Note 2 : Periodic abstinence (eg, calendar, ovulation, symptothermal, post-ovulation methods) and withdrawal are not acceptable methods of contraception.

  • Participants are able to comply with study procedures based on the assessment of the Investigator;
  • Participants willing to provide verifiable identification (following the local regulations), to be contacted, and to contact the investigator during the study period.

Exclusion Criteria:

• History of confirmed infection of SARS-CoV-2 within 3 months prior to study vaccination；
• With positive test result of SARS-CoV-2 antigen during screening visit;
• Any prior administration of another investigational COVID-19 vaccine or other licensed COVID-19 vaccines, or current/planned simultaneous participation in another interventional study to prevent or treat COVID-19;
• Known allergy to vaccines or vaccine ingredients, and serious adverse reactions to vaccines, such as urticaria, dyspnea, angioneurotic edema;
• Serious chronic disease, including but not limited to serious cardiovascular disease, hypertension and diabetes that drugs cannot control, hepatorenal disease, malignant tumor, etc;
• Acute central nervous system diseases such as encephalitis/myelitis, acute disseminating encephalomyelitis, and related disorders;
• Significant chronic central nervous system diseases or neuromuscular disorders, psychosis or severe cognitive behavioral disorder, in the opinion of the investigator, including but not limited to epilepsy, autism spectrum disorder, intellectual disabilities;
• History of autoimmune and/or hematological diseases (including but not limited to systemic lupus erythematosus, thyroidectomy, autoimmune thyroid disease, hematological malignancy, asplenia, functional asplenia, or splenectomy resulting from any condition);
• History of bleeding disorders (e.g., factor deficiency, coagulopathy or platelet disorder), or prior history of significant bleeding or bruising following IM injections or venipuncture;
• Receipt of blood/plasma products or immunoglobulins in the past 3 months before vaccination in this study;
• Participation in other studies involving study intervention within 30 days prior to vaccination in this study;
• Receipt of attenuated live vaccines in the past 14 days prior to vaccination in this study;
• Receipt of inactivated or subunit vaccines in the past 7 days prior to vaccination in this study;
• Emerging of chronic diseases or acute exacerbation of stable chronic diseases (including but not limited to asthma, migraine, gastrointestinal disorder, etc.) within 30 days prior to vaccination in this study;
• Acute febrile illness, or body temperature ≥37.8°C on the day of vaccination; enrollment could be considered if the fever is absent for 72 hours prior to vaccination;
• According to the investigator's judgment, the participant has any other factors that might interfere with the clinical trial results or pose additional risk to the participant due to participation in the study.

Sex/Gender

• Sexes Eligible for Study: All

• Ages: 3 Years and older (Child, Adult, Older Adult)
• Accepts Healthy Volunteers: Yes

Contacts

Contact: Andrés Cadena, Doctor; (+ 57) 3369999; acadena@clinicadelacosta.co

• Listed Location Countries: Colombia

Administrative Information

• NCT Number: NCT05433272
• Other Study ID Numbers: PRO-tnCOV-3003
• Has Data Monitoring Committee: No

U.S. FDA-regulated Product

• Studies a U.S. FDA-regulated Drug Product: No
• Studies a U.S. FDA-regulated Device Product: No

• IPD Sharing Statement: Not Provided
• Current Responsible Party: Sinovac Biotech Co., Ltd ( Sinovac Biotech (Colombia) S.A.S. )
• Original Responsible Party: Same as current
• Current Study Sponsor: Sinovac Biotech (Colombia) S.A.S.
• Original Study Sponsor: Same as current
• Collaborators: Sinovac Life Sciences Co., Ltd.

Investigators

• Principal Investigator: Andrés Cadena, Doctor; Clinica de la Costa

• PRS Account: Sinovac Biotech Co., Ltd
• Verification Date: January 2023