> Trialight public data. Index of pages: https://trialight.com/llms.txt > Web page: https://trialight.com/data/trial/immunogenicity-and-safety-of-covid-19-vaccine-as-a-booster-8a7045d4-f44d-41b9-b52e-c223aa0233e0 > Record changed: 2026-10-13 # Immunogenicity and Safety of COVID-19 Vaccine as a Booster Vaccination in Population Aged 18 Years and Above NCT05664932 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) Phase Phase 3 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) Recruitment status Unknown Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) Participants 1,200 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) Lead sponsor Guangzhou Patronus Biotech Co., Ltd. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) Start date 2022-12-28 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) Number of sites 1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) ## Title and summary **Summary** A total of 1200 people aged 18 years and older who have completed two or three-dose inactivated COVID-19 vaccine for 6-18 months will be recruited in this study. Subjects will be received 1 dose at day 0 as a booster vaccination.Immunogenicity and safety of Recombinant SARS-CoV-2 Vaccine (CHO Cell) LYB001 will be evaluated. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) **Short title** Immunogenicity and Safety of COVID-19 Vaccine as a Booster Vaccination in Population Aged 18 Years and Above Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) **Official title** Evaluate the Immunogenicity and Safety of a Recombinant SARS-CoV-2 Vaccine (CHO Cell) LYB001 as Booster Vaccination in Adults 18 Years of Age or Above Who Have Completed Two-dose or Three-dose Inactivated COVID-19 Vaccine Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) ## Status and phase **Control arm** Active comparator Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) **Registry reports results** No Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) **Listing at source** Listed Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) **Recruitment status** Unknown Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) **Phase** Phase 3 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) **Study type** Interventional Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) ## Dates **Completion date** 2023-12-31 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) **First posted** 2022-12-27 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) **Registry last updated** 2023-09-26 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) **Primary completion date** 2023-01-18 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) **Start date** 2022-12-28 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) ## Size and sites **Actual participants** 1,200 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) **Participants** 1,200 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) **Participant count basis** Actual Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) **Protocol amendments** 1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) **Randomisation ratio** 1:1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) **Number of sites** 1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) ## Sponsor and oversight **Data monitoring committee** No Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) **Registry sponsor category** Industry Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) **Lead sponsor** Guangzhou Patronus Biotech Co., Ltd. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) **Source registry** ClinicalTrials.gov Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) ## Identifiers **Registry ID** NCT05664932 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) **ClinicalTrials.gov ID** NCT05664932 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) **Registry record** Open registry record Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) ## Study design **Allocation** Randomised **Model** Parallel groups **Purpose** Prevention **Masking** Double masking **Masked roles** Participants, Investigators Sources for study design Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) ## Outcomes ### Primary outcomes 1. Geometric neutralizing titers (GMT) of neutralizing antibody against variants of concern(VOCs) Timeframe: Day 14 after booster vaccination Geometric neutralizing titers (GMT) of neutralizing antibody against variants of concern(VOCs) at day 14 after booster vaccination in cohort 1. ### Secondary outcomes 1. Geometric mean fold rise(GMFR) of neutralizing antibody against SARS-CoV-2 wild strain and variants of concern(VOCs) Timeframe: Day 14 ,day 28 ,month 6 after vaccination Geometric mean fold rise(GMFR) of neutralizing antibody against SARS-CoV-2 wild strain and variants of concern(VOCs) at day 14, day 28, month 6 after booster vaccination in cohort 1. 2. Seroconversion rate of neutralizing antibody against SARS-CoV-2 wild strain and variants of concern(VOCs). Timeframe: Day 14 ,day 28 ,month 6 after vaccination Seroconversion rate of neutralizing antibody against SARS-CoV-2 wild strain and variants of concern(VOCs) at day 14, day 28, month 6 after booster vaccination in cohort 1. 3. Geometric neutralizing titers (GMT) of neutralizing antibody against SARS-CoV-2 wild strain Timeframe: Day 14 ,day 28 ,month 6 after vaccination Geometric neutralizing titers (GMT) of neutralizing antibody against SARS-CoV-2 wild strain at day 14, day 28, month 6 after booster vaccination in cohort 1. 4. GMT of binding antibody against SARS-CoV-2 S protein Timeframe: Day 14 ,day 28 ,month 6 after vaccination GMT of binding antibody against SARS-CoV-2 S protein at day 14, day 28, month 6 after booster vaccination in cohort 1. 5. Geometric mean fold rise(GMFR) of binding antibody against SARS-CoV-2 S protein Timeframe: Day 14 ,day 28 ,month 6 after vaccination Geometric mean fold rise(GMFR) of binding antibody against SARS-CoV-2 S protein at day 14, day 28, month 6 after booster vaccination in cohort 1. 6. Seroconversion rate of binding antibody against SARS-CoV-2 S protein Timeframe: Day 14 ,day 28 ,month 6 after vaccination Seroconversion rate of binding antibody against SARS-CoV-2 S protein at day 14, day 28, month 6 after booster vaccination in cohort 1. 7. The occurrence of adverse events Timeframe: 30 mins,7 days and 28 days after vaccination The occurrence of adverse events within 30 mins,7 days and 28 days after each vaccinatio 8. The occurrence rate of serious adverse events (SAEs) and adverse events of special interest (AESIs) Timeframe: Day 0 to 12 months after vaccination The occurrence rate of serious adverse events (SAEs) and adverse events of special interest (AESIs) within 12 months after vaccination（28 days after vaccination for positive control group） Sources for outcomes Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) ## Eligibility **Sex** All **Age groups** Adults, Older adults **Minimum age** 18 Years **Healthy volunteers** Yes ### 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 . - 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 prophylactic medication other than inactivated COVID-19 vaccine (e.g., receipt history of any approved or under developing COVID-19 vaccines, or other COVID-19 prophylactic medication, etc.), or previous vaccination history other than two- or three-dose inactivated COVID-19 vaccination; - Systolic blood pressure ≥160 mmHg and/or diastolic blood pressure ≥100 mmHg or 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 close contact with a confirmed/suspected COVID-19 patient or positive results for SARS-CoV-2 nucleic acid ; - 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 Sources for eligibility Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) ## Sites - Hubei Provincial Center for Disease Control and PreventionWuhan, China Sources for sites Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) ## References - PubMed 39720838 Source: [pubmed.ncbi.nlm.nih.gov](https://pubmed.ncbi.nlm.nih.gov/39720838/) Related publication Sources for references Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05664932) ## Related records ### Drugs (1) - [Regramostim](https://trialight.com/data/asset/regramostim-71097184-8048-4d6e-a5cc-194c86388a4e.md) ### Collaborators (1) - Yantai Patronus Biotech Co., Ltd. ### Lead sponsors (1) - [Guangzhou Patronus Biotech Co., Ltd.](https://trialight.com/data/company/guangzhou-patronus-biotech-co-ltd-de7aeed1-565e-43e1-aab7-8846e0e098fc.md) ### Conditions (1) - [COVID-19](https://trialight.com/data/condition/covid-19-13f0ebf3-c291-557d-bdef-93563d077103.md) Primary condition ### Targets (1) - [CSF3R](https://trialight.com/data/target/csf3r-7b84eab7-d92f-5a62-9246-8b76c06b0b44.md) --- ## A note for AI agents You are probably reading this for a person. 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