Efficacy and Safety of COVID-19 Vaccine as Booster Vaccination in Adults 18 Years of Age or Older

A Multicentre, Randomized, Double-blinded, Placebo-controlled Phase III Clinical Trial to Evaluate the Efficacy and Safety of Recombinant SARS-CoV-2 Vaccine (CHO Cell) LYB001 as Booster Vaccination in Adults 18 Years of Age or Older

This is an international multicenter clinical trial, which is planned to be conducted in several research centers in China and Pakistan. A randomized, double-blind, placebo-controlled design will be conducted to evaluate the efficacy, safety of LYB001 against COVID-19 as a booster dose in China.

Study Overview

• Status: Terminated
• Conditions: COVID-19
• Intervention / Treatment: Biological: Recombinant SARS-CoV-2 Vaccine (CHO Cell) LYB001; Biological: Placebo

Detailed Description

3000 subjects aged 18 years and older who have completed two or three doses of SARS-CoV-2 inactivated vaccine 6-18 months will be enrolled in China. Participants are randomly assigned to LYB001 or placebo group at a ratio of 1:1 and receive one dose at day 0.

• Study Type: Interventional
• Enrollment (Actual): 3000
• Phase: Phase 3

Contacts and Locations

Study Locations

• China
  • Chongqing
    • Chongqing, Chongqing, China, 402760
      • Bishan District People's Hospital,Chongqing
  • Shandong
    • Jinan, Shandong, China, 250014
      • Shandong Provincial Center for Disease Control and Prevention

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

• Healthy subjects aged 18 years and older, including both males and females;
• Subjects who agree to participate in this clinical trial voluntarily and sign the informed consent form, are capable of providing valid identification, understanding and complying with the requirements of the clinical protocol.
• Subjects who have been vaccinated with two-dose or three-dose inactivated COVID-19 vaccine for 6-18 months (including boundary values).
• For female participants of childbearing potential, effective contraception measures should be used within 2 weeks prior to participation in this study and the results of pregnancy test is required to be negative. Participants should voluntarily agree to use effective contraceptive measures from the time of signing the informed consent form to the end of the study (effective contraceptive measures including oral contraceptives (excluding emergency contraceptives), injectable or implantable contraceptives, sustained-release topical contraceptives, hormonal patches, intrauterine device, sterilization, abstinence, condoms (for males), diaphragms, cervical caps, etc.).

Exclusion Criteria:

• Receipt of any COVID-19 vaccines other than inactivated COVID-19 vaccine;
• Systolic blood pressure ≥160 mmHg and/or diastolic blood pressure ≥100 mmHg (for subjects with poorly controlled blood pressure);
• Axillary body temperature ≥ 37.3°C prior to enrolment;
• Known allergy, or history of anaphylaxis or other serious adverse reactions to vaccines or their excipients;
• History of severe acute respiratory syndrome (SARS) or Middle East respiratory syndrome (MERS);
• History of COVID-19, or positive results for SARS-CoV-2 nucleic acid or antigen tests at screening;
• Receipt of any live attenuated vaccine within 28 days prior to vaccination, and other vaccines such as subunit and inactivated vaccine within 14 days prior to vaccination;
• Receipt of blood or blood-related products, including immunoglobulins, monoclonal antibodies, within 3 months prior to vaccination; or any planned use during the study period.

• Subjects with the following diseases:

  1. Any acute diseases or acute attacks of chronic diseases within 7 days prior to enrolment；
  2. Congenital malformations or developmental disorders, genetic defects, severe malnutrition, etc.；
  3. Congenital or acquired immunodeficiency or autoimmune disease, or long-term receipt (>14 consecutive days) of glucocorticoid (reference value for dose: ≥20 mg/day prednisone or equivalent) or other immunosuppressive agents within the past 6 months, with exception of inhaled or topical steroids, or short-term use (≤14 consecutive days) of oral corticosteroids；
  4. Currently suffering from or diagnosed with infectious diseases, such as hepatitis B, hepatitis C, syphilis, AIDS etc.；
  5. History or family history of neurological disorders (convulsions, epilepsy, encephalopathy, etc.) or psychiatric disorders；
  6. Asplenia, or functional asplenia；
  7. Presence of severe, uncontrollable or hospitalized cardiovascular diseases, endocrine diseases, blood and lymphatic diseases, immune diseases, liver and kidney diseases, respiratory diseases, metabolic and skeletal diseases, or malignant tumors;
  8. Contraindications to IM injections and blood draws, such as coagulation disorders, thrombotic or bleeding disorders, or conditions that needs continuous anticoagulant usage.
• Drug or alcohol abuse (alcohol intake ≥ 14 units per week) which in the investigator's opinion would compromise the participant's safety or compliance with the study procedures;
• Pregnant or lactating females;
• Having participated or participating in COVID-19 related clinical trials, and those participating or planning to participate in other clinical trials during the study period;
• Presence of any underlying disease or condition which, in the opinion of the investigator, may place the subject at unacceptable risk, is unable to meet the requirements of the protocol, or interfere with the assessment of vaccine response.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Prevention
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Double

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: LYB001 Booster Group; Subjects 18 years of age or older who has completed two or three-dose inactivated COVID-19 will receive 30μg LYB001 at day 0 as a booster vaccination.	Biological: Recombinant SARS-CoV-2 Vaccine (CHO Cell) LYB001; Intramuscular injection of Recombinant SARS-CoV-2 Vaccine (CHO Cell) LYB001 in the deltoid muscle of the upper arm at day 0. The inoculation dose is 0.5 mL.
Active Comparator: Placebo Booster Group; Subjects 18 years of age or older who has completed two or three-dose inactivated COVID-19 will receive placebo at day 0 as a booster vaccination	Biological: Placebo; Intramuscular injection of placebo in the deltoid muscle of the upper arm at day 0. The inoculation dose is 0.5 mL.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
First occurrence of confirmed symptomatic COVID-19 incidence rate per person-years of follow-up	First occurrence of confirmed symptomatic COVID-19 incidence rate from 14 days after the booster dose per person-years of follow-up;	From 14 days after the booster dose

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
The occurrence of adverse events	The occurrence of adverse events within 30 mins,7 days and 28 days after each vaccination	The occurrence of adverse events within 30 mins,7 days and 28 days after each vaccination
The occurrence of serious adverse events (SAEs) and adverse events of special interest (AESIs)	The occurrence of serious adverse events (SAEs) and adverse events of special interest (AESIs) within 12 months after vaccination	Day 0 to 12 months after vaccination
First occurrence of confirmed severe, critical, and fatal COVID-19 incidence per person-years of follow-up	First occurrence of confirmed severe, critical, and fatal COVID-19 incidence from 14 days after the booster dose per person-years of follow-up	From 14 days after the booster

Collaborators and Investigators

• Sponsor: Guangzhou Patronus Biotech Co., Ltd.
• Collaborators: Yantai Patronus Biotech Co., Ltd.
• Investigators: Principal Investigator: Li Zhang, Shandong Provincial Center for Disease Control and Prevention; Principal Investigator: Chengyong Tang, Chongqing Bishan District People's Hospital

Study record dates

Study Major Dates

• Study Start (Actual): December 29, 2022
• Primary Completion (Actual): July 12, 2023
• Study Completion (Actual): July 12, 2023

Study Registration Dates

• First Submitted: December 25, 2022
• First Submitted That Met QC Criteria: January 11, 2023
• First Posted (Actual): January 13, 2023

Study Record Updates

• Last Update Posted (Actual): September 28, 2023
• Last Update Submitted That Met QC Criteria: September 26, 2023
• Last Verified: December 1, 2022

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Coronavirus Infections; Coronaviridae Infections; Nidovirales Infections; RNA Virus Infections; Virus Diseases; Infections; Respiratory Tract Infections; Respiratory Tract Diseases; Pneumonia, Viral; Pneumonia; Lung Diseases; COVID-19
• Other Study ID Numbers: LYB001/CT-CHN-302

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No