> Trialight public data. Index of pages: https://trialight.com/llms.txt > Web page: https://trialight.com/data/trial/a-phase-ii-clinical-trial-to-evaluate-the-immunogenicity-and-6bfdab8c-4270-4858-8f91-48a7ee1212f5 > Record changed: 2026-10-13 # A Phase II Clinical Trial to Evaluate the Immunogenicity and Safety of SCTV01C and SCTV01E in Population Aged ≥12 Years Previously Fully Vaccinated With Inactivated COVID-19 Vaccine NCT05239806 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) Phase Phase 2 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) Recruitment status Unknown Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) Participants 400 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) Lead sponsor Sinocelltech Ltd. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) Start date 2022-04-01 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) ## Title and summary **Summary** The objective of study is to evaluate the immunogenicity and safety of SCTV01C or SCTV01E as booster compared with Sinopharm inactivated COVID-19 vaccine as booster. The study will also evaluate the immunogenicity and safety of 2-dose vaccinations. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) **Short title** A Phase II Clinical Trial to Evaluate the Immunogenicity and Safety of SCTV01C and SCTV01E in Population Aged ≥12 Years Previously Fully Vaccinated With Inactivated COVID-19 Vaccine Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) **Official title** A Randomized, Double-blind Phase II Clinical Trial to Evaluate the Immunogenicity and Safety of SCTV01C (A Bivalent SARS-CoV-2 Trimeric Spike Protein Vaccine) and SCTV01E (A COVID-19 Alpha/Beta/Delta/Omicron Variants S-Trimer Vaccine) in Population Aged ≥12 Years Previously Fully Vaccinated With Inactivated COVID-19 Vaccine Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) ## Status and phase **Control arm** Active comparator Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) **Registry reports results** No Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) **Listing at source** Listed Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) **Recruitment status** Unknown Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) **Phase** Phase 2 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) **Study type** Interventional Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) ## Dates **Completion date** 2023-08-01 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) **First posted** 2022-02-15 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) **Registry last updated** 2022-04-11 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) **Primary completion date** 2022-08-01 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) **Start date** 2022-04-01 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) ## Size and sites **Participants** 400 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) **Participant count basis** Estimated Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) **Planned participants** 400 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) **Protocol amendments** 2 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) ## Sponsor and oversight **Registry sponsor category** Industry Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) **Lead sponsor** Sinocelltech Ltd. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) **Source registry** ClinicalTrials.gov Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) ## Identifiers **Registry ID** NCT05239806 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) **ClinicalTrials.gov ID** NCT05239806 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) **Registry record** Open registry record Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) ## Study design **Allocation** Randomised **Model** Parallel groups **Purpose** Prevention **Masking** Triple masking **Masked roles** Participants, Care providers, Investigators Sources for study design Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) ## Outcomes ### Primary outcomes 1. GMT of neutralizing antibodies against Delta (B.1.617.2) variant on Day 28. Timeframe: Day 28 after the study vaccination 2. GMT of neutralizing antibodies against Omicron (B.1.1.529) variant on Day 28. Timeframe: Day 28 after the study vaccination 3. GMT of neutralizing antibodies against Delta (B.1.617.2) variant on Day 208. Timeframe: Day 208 after the study vaccination 4. GMT of neutralizing antibodies against Omicron (B.1.1.529) variant on Day 208. Timeframe: Day 208 after the study vaccination ### Secondary outcomes 1. Number of IFN-γ positive (characterizing Th1) and IL-4 positive (characterizing Th2) T cell subsets on Day 28 and Day 208. Timeframe: Day 28 and D208 after the study vaccination 2. Seroresponse rates of neutralizing antibodiesto Delta variant on Day 28. Timeframe: Day 28 after the study vaccination 3. Seroresponse rates of neutralizing antibodies to Omicron variant rates on Day 28. Timeframe: Day 28 after the study vaccination 4. Seroresponse rates of neutralizing antibodies to Delta variant on Day 208. Timeframe: Day 208 after the study vaccination 5. Seroresponse rates of neutralizing antibodies to Omicron variant on Day 208. Timeframe: Day 208 after the study vaccination 6. Incidence and severity of solicited AEs of SCTV01C from Day 0 to Day 7 and Day 180 to Day 187. Timeframe: Day 0 to Day 7 after the 1st study vaccination and Day 180 to Day 187 after the 2nd study vaccination 7. Incidence and severity of all unsolicited AEs of SCTV01C from Day 0 to Day 28 and Day 180 to Day 208. Timeframe: Day 0 to Day 28 after the 1st study vaccination and Day 180 to Day 208 after the 2nd study vaccination 8. Incidence and severity of SAEs and AESIs of SCTV01C within 365 days. Timeframe: Day 0 to Day 365 after the 1st study vaccination 9. Incidence and severity of solicited AEs of SCTV01E from Day 0 to Day 7 and Day 180 to Day 187. Timeframe: Day 0 to Day 7 after the 1st study vaccination and Day 180 to Day 187 after the 2nd study vaccination 10. Incidence and severity of all unsolicited AEs of SCTV01E from Day 0 to Day 28 and Day 180 to Day 208. Timeframe: Day 0 to Day 28 after the 1st study vaccination and Day 180 to Day 208 after the 2nd study vaccination 11. Incidence and severity of SAEs and AESIs of SCTV01E within 365 days. Timeframe: Day 0 to Day 365 after the 1st study vaccination Sources for outcomes Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) ## Eligibility **Sex** All **Age groups** Children, Adults, Older adults **Minimum age** 12 Years **Healthy volunteers** Yes ### Inclusion criteria 1. Male or female aged ≥12 years old when signing ICF; 2. Participants who were fully vaccinated with inactivated COVID-19 vaccine (Sinopharm inactivated COVID-19 vaccine), and the interval between the last dose and this study vaccination is ≥3 months and ≤12 months; 3. The participant and/or his legal guardian and/or his entrusted person can sign written ICF, and can fully understand the trial procedure, the risk of participating in the trial, and other interventions that can be selected if they do not participate in the trial; 4. The participant and/or his legal guardian and/or his entrusted person have the ability to read, understand, and fill in record cards; 5. Healthy participants or participants with pre-existing medical conditions who are in stable condition. The "pre-existing medical conditions" include but not limited to hypertension, diabetes, chronic cholecystitis and cholelithiasis, chronic gastritis that meet the described criteria. A stable medical condition is defined as disease not requiring significant change in therapy or no need for hospitalization as a consequence of worsening disease state for at least 3 months prior to enrollment; 6. Fertile men and women of childbearing potential voluntarily agree to take effective contraceptive measures from signing ICF to 6 months after the 1st study vaccination; the pregnancy test results of women of childbearing potential are negative on screening. ### Exclusion criteria 1. Previously diagnosed with COVID-19; 2. Presence of fever within 3 days before the study vaccination; 3. A history of infection or disease related to severe acute respiratory syndrome (SARS), Middle East respiratory syndrome (MERS), or other disease corresponding use of immunosuppressants; 4. A history of allergic reactions to any vaccine or drug, such as allergy, urticaria, severe skin eczema, dyspnea, laryngeal edema, and angioneurotic edema; 5. A medical or family history of seizure, epilepsy, encephalopathy and psychosis; 6. Immunocompromised patients suffering from immunodeficiency diseases, important organ diseases, immune diseases (including Guillain-Barre Syndrome \[GBS\], systemic lupus erythematosus, rheumatoid arthritis, asplenia or splenectomy caused by any circumstances, and other immune diseases that may have an impact on immune response in the investigator's opinion), etc.; 7. Long-term use of immunosuppressant therapy or immunomodulatory drugs for ≥14 days within the first six months prior to enrollment. Whereas short-term (≤14 days) use of oral, inhaled and topical steroids are allowed; 8. Patients on antituberculosis therapy; 9. Presence of severe or uncontrollable cardiovascular diseases, or severe or uncontrollable disorders related to endocrine system, blood and lymphatic system, liver and kidney, respiratory system, metabolic and skeletal systems, or malignancies (except for skin basal cell carcinoma and carcinoma in-situ of cervix), such as severe heart failure, severe pulmonary heart disease, unstable angina, liver failure, or uremia; 10. Contraindications for intramuscular injection or intravenous blood sampling, including thrombocytopenia and other blood coagulation disorders; 11. Participants who received any immunoglobulin or blood products in the previous 3 months before enrollment, or plan to receive similar products during the study; 12. Participants who received other investigational drugs within 1 month before the study vaccination; 13. Participants who is at the acute state of disease, such as acute onset of chronic heart failure, acute sore throat, hypertensive encephalopathy, acute pneumonia, acute renal insufficiency, acute cholecystitis; 14. Participants received other drugs or vaccines used to prevent COVID-19 (exception for Sinopharm inactivated COVID-19 vaccine) ; 15. Participants vaccinated with influenza vaccine within 14 days or with other vaccines within 28 days before the study vaccination; 16. Those who donated blood or had blood loss (≥450 mL) within 3 months before the vaccination or plan to donate blood during the study period; 17. Those who are pregnant or breast-feeding or plan to be pregnant during the study period; 18. Those who plan to donate ovum or sperms during the study period; 19. Those who cannot follow the trial procedures, or cannot cooperate to complete the study due to planned relocation or long-term outing; 20. Those unsuitable for participating in the clinical trial as determined by the investigator because of other abnormalities that are likely to confuse the study results, or non-conformance with the maximal benefits of the participants; 21. Those who are tested positive for HIV in terms of serology. Sources for eligibility Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05239806) ## Related records ### Drugs (1) - [Tozinameran](https://trialight.com/data/asset/tozinameran-bb0e4f65-bf06-4152-bd75-c7c1f5505a9d.md) ### Lead sponsors (1) - [Sinocelltech Ltd.](https://trialight.com/data/company/sinocelltech-ltd-26ae8da6-0626-457a-96bd-70bfdcada535.md) ### Conditions (1) - [COVID-19](https://trialight.com/data/condition/covid-19-13f0ebf3-c291-557d-bdef-93563d077103.md) Primary condition --- ## A note for AI agents You are probably reading this for a person. 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