Safety and Immunogenicity Study of an Inactivated SARS-CoV-2 Vaccine for Preventing Against COVID-19

Phase 1

Completed

• Conditions: COVID-19
• Interventions: Biological: High dosage Inactivated SARS-CoV-2 Vaccine on a 0- and 14-day schedule; Biological: Placebo on a 0- and 14-day schedule; Biological: High dosage Inactivated SARS-CoV-2 Vaccine on a 0- and 28-day schedule; Biological: Low dosage Inactivated SARS-CoV-2 Vaccine on a 0- and 28-day schedule; Biological: Medium dosage Inactivated SARS-CoV-2 Vaccine on a 0- and 14-day schedule; Biological: Low dosage Inactivated SARS-CoV-2 Vaccine on a 0- and 14-day schedule; Biological: Medium dosage Inactivated SARS-CoV-2 Vaccine on a 0- and 28-day schedule; Biological: Placebo on a 0- and 28-day schedule

• Registration Number: NCT04412538
• Lead Sponsor: Institute of Medical Biology, Chinese Academy of Medical Sciences

Brief Summary

This study is a randomized, double-blinded, and placebo-controlled phase Ia/IIa clinical trial of the Inactivated SARS-CoV-2 Vaccine to evaluate the safety and immunogenicity of the vaccine in healthy people aged 18\~59 Years.

Detailed Description

This phase Ia/IIa trial is designed to evaluate the safety and immunogenicity of different doses of the Inactivated SARS-CoV-2 Vaccine inoculated with different immunization schedules based upon the randomized, double-blind and placebo-controlled principle. A total of 942 subjects aged 18 to 59 years old will be enrolled in the study, of which 192 and 750 will be enrolled for phase Ia and phase Ⅱa,respectively.The enrolled subjects in phase Ia receive two doses of low-, medium-, or high-dose of experimental vaccines or placebo at an interval of 14 or 28 days, while the enrolled subjects in Phase Ⅱa receive two doses of medium, high-dose experimental vaccines or placebo at an interval of 14 or 28 days.

Study Timeline

• Study Start: 2020-05-15
• Study First Submitted: 2020-05-21
• Study First Submitted QC: 2020-06-01
• Study First Posted: 2020-06-02
• Primary Completion: 2020-08-10
• Study Completion: 2021-08-31
• Status Verified: 2023-10
• Last Update Submitted: 2023-10-08
• Last Update Posted: 2023-10-11

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 942

Inclusion Criteria

• Phase Ia:

  1. Healthy adults aged 18 to 59 years (including boundary values), both men and women.
  2. Proven legal identity.
  3. Participants should understand the contents of the informed consent form, the vaccine in this trial, voluntarily sign the informed consent form, and be capable of using thermometers, scales, and filling in diary cards and contact cards as required.
  4. Participants should be able to communicate well with investigators, understand and comply with the requirements of this trial.
  5. Axillary temperature ≤37.0 ℃.

• Phase IIa:

  1. Healthy adults aged 18 to 59 years (including boundary values), both men and women.
  2. Proven legal identity.
  3. Participants should understand the contents of the informed consent form, the vaccine in this trial, voluntarily sign the informed consent form, and be capable of using thermometers, scales, and filling in diary cards and contact cards as required.
  4. Participants should be able to communicate well with investigators, understand and comply with the requirements of this trial.
  5. Axillary temperature ≤37.0 ℃.

Exclusion Criteria

• Phase Ia:

  1. Contraindications for vaccination.
  2. History of allergy to vaccines or drugs.
  3. Immunization with any vaccine within 1 month.
  4. History of abnormal clinical manifestations and serious diseases to be excluded, including but not limited to nervous system, cardiovascular system, blood and lymphatic system, immune system, kidney, liver, gastrointestinal tract, respiratory system, metabolism, bones and other system diseases, and a history of malignant tumors.
  5. Those who developed acute disease within 2 weeks, or had symptoms of fever or upper respiratory tract infection within 7 days.
  6. Those who have a hereditary bleeding tendency or coagulation dysfunction, or a history of thrombosis or bleeding disorders.
  7. Those who cannot tolerate venipuncture, or have a history of halo needles or halo blood.
  8. Surgical removal of spleen or other important organs for any reason.
  9. Those who have undergone surgery within 3 months before signing the informed consent, or those who plan to perform surgery during the trial or within 3 months after the end of the trial (including cosmetic surgery, dental and oral surgery).
  10. Those who donated or lost blood (≥400 mL) in the past 3 months, who received blood transfusion or use of blood products, or who planned blood donation during the trial.
  11. Receipt of other investigational or unregistered products (drugs, vaccines, biological product or devices) in the past 3 months, or plan to use other investigational or unregistered products during the study.
  12. Receipt of immunosuppressive therapy within 6 months before signing the informed consent form, such as long-term systemic glucocorticoid therapy (with systemic glucocorticoid therapy for more than 2 weeks within 6 months, such as prednisone or similar drugs) ), but local administration (such as ointment, eye drops, inhalation, or nasal spray) is allowed. The local administration should not exceed the dosage recommended in the instructions or have any signs of systemic exposure.
  13. Those who have took soft drugs (such as marijuana) within 3 months before signing the informed consent form or took hard drugs (such as: cocaine, phencyclidine, etc.) within 1 year before the trial.
  14. Those who smoked more than 5 cigarettes per day within 3 months before signing the informed consent form.
  15. The weekly drinking volume is greater than 14 units within 3 months before signing the informed consent form (1 unit alcohol approximately equal to 360 mL beer or 45 mL spirits with 40% alcohol content or 150 mL wine).
  16. The comprehensive physical examination does not meet the health standards, mainly including: (1) Those with abnormal vital signs with clinical significance. (2) BMI<18 kg/m^2 or> 30 kg/m^2. (3) Abnormal laboratory examination with clinical significance. (4) Those who tested positive for human immunodeficiency virus (HIV) antibody, hepatitis B surface antigen, hepatitis B e antigen, hepatitis C virus antibody, or Treponema pallidum antibody (tp-trust).
  17. Participants who have a positive pregnancy test, or are breastfeeding, or plan to become pregnant, or plan to donate sperm or eggs from the screening to 12 months after the second vaccination.
  18. Positive in drug abuse screening during the screening period (Morphine, Methamphetamine, Ketamine, MDMA and Tetrahydrocannabinolic acid).
  19. Positive in alcohol breath test during the screening period.
  20. Positive in SARS-CoV-2 nucleic acid screening or antibodies (IgG or IgM) screening.
  21. History of severe acute respiratory syndrome (SARS) or Middle East respiratory syndrome (MERS) or other coronavirus infection (HCoV-229E, HCoV-OC43, HCoV-NL63, HCoV-HKU1).
  22. History of contact with confirmed or suspected cases infected with SARS-CoV-2 within 1 month.
  23. Any other situations judged by investigators as not suitable for participating in this study.

• Phase IIa:

  1. Contraindications for vaccination.
  2. History of allergy to vaccines or drugs.
  3. Immunization with any vaccine within 1 month.
  4. History of abnormal clinical manifestations and serious diseases to be excluded, including but not limited to nervous system, cardiovascular system, blood and lymphatic system, immune system, kidney, liver, gastrointestinal tract, respiratory system, metabolism, bones and other system diseases, and a history of malignant tumors.
  5. Those who developed acute disease within 2 weeks, or had symptoms of fever or upper respiratory tract infection within 7 days.
  6. Those who have a hereditary bleeding tendency or coagulation dysfunction, or a history of thrombosis or bleeding disorders.
  7. Surgical removal of spleen or other important organs for any reason.
  8. Those who have undergone surgery within 3 months before signing the informed consent, or those who plan to perform surgery during the trial or within 3 months after the end of the trial (including cosmetic surgery, dental and oral surgery).
  9. Those who donated or lost blood (≥400 mL) in the past 3 months, who received blood transfusion or use of blood products, or who planned blood donation during the trial.
  10. Receipt of other investigational or unregistered products (drugs, vaccines, biological product or devices) in the past 3 months, or plan to use other investigational or unregistered products during the study.
  11. Receipt of immunosuppressive therapy within 6 months before signing the informed consent form, such as long-term systemic glucocorticoid therapy (with systemic glucocorticoid therapy for more than 2 weeks within 6 months, such as prednisone or similar drugs) ), but local administration (such as ointment, eye drops, inhalation, or nasal spray) is allowed. The local administration should not exceed the dosage recommended in the instructions or have any signs of systemic exposure.
  12. The comprehensive physical examination does not meet the health standards, mainly including: (1) Those with abnormal vital signs (Pulse <55 beats per minute or> 100 beats per minute at rest, Systolic blood pressure ≥140mmHg or Diastolic blood pressure ≥90mmHg, breathing> 20 beats per minute or <12 beats per minute). (2) Those who tested positive for human immunodeficiency virus (HIV) antibody, hepatitis B surface antigen, hepatitis B e antigen, hepatitis C virus antibody, or Treponema pallidum antibody (tp-trust).
  13. Participants who have a positive pregnancy test, or are breastfeeding, or plan to become pregnant, or plan to donate sperm or eggs from the screening to 12 months after the second vaccination.
  14. Positive in SARS-CoV-2 nucleic acid screening or antibodies (IgG or IgM) screening.
  15. History of severe acute respiratory syndrome (SARS) or Middle East respiratory syndrome (MERS) or other coronavirus infection (HCoV-229E, HCoV-OC43, HCoV-NL63, HCoV-HKU1).
  16. History of contact with confirmed or suspected cases infected with SARS-CoV-2 within 1 month.
  17. Any other situations judged by investigators as not suitable for participating in this study.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
High dosage vaccine on a 0- and 14-day schedule	High dosage Inactivated SARS-CoV-2 Vaccine on a 0- and 14-day schedule	Two doses of high dosage Inactivated SARS-CoV-2 Vaccine at the vaccination schedule of day 0, 14
Placebo on a 0- and 14-day schedule	Placebo on a 0- and 14-day schedule	Two doses of placebo at the vaccination schedule of day 0, 14
High dosage vaccine on a 0- and 28-day schedule	High dosage Inactivated SARS-CoV-2 Vaccine on a 0- and 28-day schedule	Two doses of high dosage Inactivated SARS-CoV-2 Vaccine at the vaccination schedule of day 0, 28
Low dosage vaccine on a 0- and 28-day schedule	Low dosage Inactivated SARS-CoV-2 Vaccine on a 0- and 28-day schedule	Two doses of low dosage Inactivated SARS-CoV-2 Vaccine at the vaccination schedule of day 0, 28
Medium dosage vaccine on a 0- and 14-day schedule	Medium dosage Inactivated SARS-CoV-2 Vaccine on a 0- and 14-day schedule	Two doses of medium dosage Inactivated SARS-CoV-2 Vaccine at the vaccination schedule of day 0, 14
Low dosage vaccine on a 0- and 14-day schedule	Low dosage Inactivated SARS-CoV-2 Vaccine on a 0- and 14-day schedule	Two doses of low dosage Inactivated SARS-CoV-2 Vaccine at the vaccination schedule of day 0, 14
Medium dosage vaccine on a 0- and 28-day schedule	Medium dosage Inactivated SARS-CoV-2 Vaccine on a 0- and 28-day schedule	Two doses of medium dosage Inactivated SARS-CoV-2 Vaccine at the vaccination schedule of day 0, 28
Placebo on a 0- and 28-day schedule	Placebo on a 0- and 28-day schedule	Two doses of placebo at the vaccination schedule of day 0, 28

Primary Outcome Measures

Name	Time	Method
Adverse reactions/events rate	28 days after vaccination	Occurence of adverse reactions/events after vaccination
Seroconversion rate of Neutralizing antibodies against SARS-CoV-2 Phase IIa (Day 0, 14 schedule)	14 days after the second vaccination	Seroconversion rate of neutralizing antibodies against SARS-CoV-2 in serum for the Phase IIa immunization schedule of day 0,14
Seroconversion rate of IgG antibodies against SARS-CoV-2 Phase IIa (Day 0, 14 schedule)	14 days after the second vaccination	Seroconversion rate of IgG antibodies against SARS-CoV-2 tested by ELISA in serum for the Phase IIa immunization schedule of day 0,14
Seroconversion rate of Neutralizing antibodies against SARS-CoV-2 Phase IIa (Day 0, 28 schedule)	28 days after the second vaccination	Seroconversion rate of neutralizing antibodies against SARS-CoV-2 in serum for the Phase IIa immunization schedule of day 0,28
Seroconversion rate of IgG antibodies against SARS-CoV-2 Phase IIa (Day 0, 28 schedule)	28 days after the second vaccination	Seroconversion rate of IgG antibodies against SARS-CoV-2 tested by ELISA in serum for the Phase IIa immunization schedule of day 0,28

Secondary Outcome Measures

Name	Time	Method
Serious adverse events	12 months after the second vaccination	Occurence of Serious adverse events after vaccination
Level of Neutralizing antibodies against SARS-CoV-2 Phase Ia (Day 0, 14 schedule)	7, 14 and 28 days after the second vaccination	Level of neutralizing antibodies against SARS-CoV-2 in serum for the Phase Ia immunization schedule of day 0,14
Level of IgG antibodies against SARS-CoV-2 Phase IIa (Day 0, 14 schedule)	14 and 28 days after the second vaccination	Level of IgG antibodies against SARS-CoV-2 tested by ELISA in serum for the Phase IIa immunization schedule of day 0,14
Level of IgG antibodies against SARS-CoV-2 Phase Ia (Day 0, 28 schedule)	7 and 28 days after the second vaccination	Level of IgG antibodies against SARS-CoV-2 tested by ELISA in serum for the Phase Ia immunization schedule of day 0,28
Seroconversion rate of Neutralizing antibodies against SARS-CoV-2 Phase Ia (Day 0, 14 schedule)	14 days after the second vaccination	Seroconversion rate of neutralizing antibodies against SARS-CoV-2 in serum for the Phase Ia immunization schedule of day 0,14
Seroconversion rate of IgG antibodies against SARS-CoV-2 Phase Ia (Day 0, 14 schedule)	14 days after the second vaccination	Seroconversion rate of IgG antibodies against SARS-CoV-2 tested by ELISA in serum for the Phase Ia immunization schedule of day 0,14
Seroconversion rate of Neutralizing antibodies against SARS-CoV-2 Phase Ia (Day 0, 28 schedule)	28 days after the second vaccination	Seroconversion rate of neutralizing antibodies against SARS-CoV-2 in serum for the Phase Ia immunization schedule of day 0,28
Level of Neutralizing antibodies against SARS-CoV-2 Phase IIa (Day 0, 14 schedule)	14 and 28 days after the second vaccination	Level of neutralizing antibodies against SARS-CoV-2 in serum for the Phase IIa immunization schedule of day 0,14
Level of IgG antibodies against SARS-CoV-2 Phase Ia (Day 0, 14 schedule)	7, 14 and 28 days after the second vaccination	Level of IgG antibodies against SARS-CoV-2 tested by ELISA in serum for the Phase Ia immunization schedule of day 0,14
Level of Neutralizing antibodies against SARS-CoV-2 Phase Ia (Day 0, 28 schedule)	7 and 28 days after the second vaccination	Level of neutralizing antibodies against SARS-CoV-2 in serum for the Phase Ia immunization schedule of day 0,28
Level of Neutralizing antibodies against SARS-CoV-2 Phase IIa (Day 0, 28 schedule)	28 days after the second vaccination	Level of neutralizing antibodies against SARS-CoV-2 in serum for the Phase IIa immunization schedule of day 0,28
Level of IgG antibodies against SARS-CoV-2 Phase IIa (Day 0, 28 schedule)	28 days after the second vaccination	Level of IgG antibodies against SARS-CoV-2 tested by ELISA in serum for the Phase IIa immunization schedule of day 0,28
Seroconversion rate of IgG antibodies against SARS-CoV-2 Phase Ia (Day 0, 28 schedule)	28 days after the second vaccination	Seroconversion rate of IgG antibodies against SARS-CoV-2 tested by ELISA in serum for the Phase Ia immunization schedule of day 0,28

Trial Locations

Locations (1)

West China Second University Hospital, Sichuan University / West China women's and children's Hospital; 🇨🇳 Chengdu, Sichuan, China