Evaluating a new COVID-19 mRNA vaccine for safety and immune response

A Randomized, Blinded, Controlled Phase II Clinical Trial to Evaluate the Immunogenicity and Safety of a COVID-19 mRNA Vaccine (ZSVG-02-O) in a Healthy Population 18 Years of Age and Older

This study is testing a new COVID-19 mRNA vaccine to see if it's safe and how well it works in healthy adults aged 18 and older.

Quick facts

• Phase: Phase 2
• Study type: Interventional
• Enrollment: 980 (estimated)
• Ages: 18 Years to 99 Years
• Sex: All
• Sponsor: CNBG-Virogin Biotech (Shanghai) Ltd. (Industry-sponsored)
• Locations: 2 sites (Dengfeng, Henan and 1 other locations)
• Trial ID: NCT06113731 on ClinicalTrials.gov

What this trial studies

This study assesses the safety and immunogenicity of the COVID-19 mRNA vaccine ZSVG-02-O in healthy adults aged 18 and older. It employs a randomized, blinded, and controlled design, stratifying participants into two age groups: 18-59 years and 60 years or older. Participants will receive either the test vaccine at varying doses or an active control vaccine in a structured dosing regimen. A total of 980 subjects will be enrolled to evaluate the vaccine's effectiveness and safety profile.

Who should consider this trial

Good fit: Ideal candidates include healthy adults aged 18 years and older who have not been previously vaccinated against COVID-19 or have not been infected recently.

Not a fit: Patients who have recently tested positive for COVID-19 or have received more than three doses of a COVID-19 vaccine may not benefit from this study.

Why it matters

Potential benefit: If successful, this vaccine could enhance immunity against COVID-19, potentially reducing infection rates and severity of illness.

How similar studies have performed: Other studies evaluating mRNA vaccines for COVID-19 have shown promising results, indicating that this approach is supported by prior success.

Eligibility criteria

Inclusion Criteria:

1. Healthy male or female subjects aged ≥18 years of age;
2. Subjects who are in good physical condition as judged by the investigator based on medical history, physical examination and clinical laboratory tests;
3. Subjects who have not been previously vaccinated with a Covid-19 vaccine or who have received the last dose (total dose ≤ 3 doses) of a Covid-19 vaccine at least 6 months ago;
4. Subjects who have not been previously infected with Covid-19, or whose nucleic acid or antigen test has turned negative for more than 3 months after previous Covid-19 infection;
5. Subjects are able to understand the study procedures, have provide written informed consent, and are able to comply with the requirements of the clinical study protocol.

Exclusion criteria

1. Axillary temperature ≥37.3°C;
2. Positive polymerase chain reaction (PCR) test results within the last 48 hours;
3. Women of childbearing potential with a positive urine pregnancy test result, or who are pregnant or breastfeeding, or who have not used effective contraception within 2 weeks prior to enrolment, or women and men who plan to have children within 12 months after full immunisation;
4. History of epilepsy, convulsions or seizures, psychosis or family history of psychosis;
5. Have a history of severe allergy to any medication or vaccination (e.g. acute allergic reaction, urticaria, skin eczema, dyspnoea, angioneurotic oedema, or abdominal pain) or allergy to known components of a Covid-19 vaccine;
6. Have a history of hospital-diagnosed thrombocytopenia or other coagulation disorders;
7. Have a history of hospital-diagnosed known immunological impairment or hypofunction;
8. Subjects who have received whole blood, plasma or immunoglobulin therapy within 3 months;
9. Known or suspected concomitant serious diseases, including: respiratory diseases, acute infections or active chronic diseases, liver and kidney diseases, severe diabetes, malignant tumours, infectious or allergic skin diseases, and HIV infection (with test report);
10. Have serious cardiovascular diseases, cardiopulmonary failure, hypertension that cannot be controlled by medication (systolic blood pressure ≥ 140mmHg and/or diastolic blood pressure ≥ 90mmHg on physical examination);
11. Received live attenuated vaccine within 1 month prior to vaccination or other vaccines within 14 days prior to vaccination;
12. Participation in a clinical trial of another drug within 3 months prior to the first dose of vaccine or planning to participate in a clinical trial of another drug during the study period;
13. Any other conditions that the investigator considers inappropriate for participation in this study.

Where this trial is running

Dengfeng, Henan and 1 other locations

• Dengfeng Centre for Disease Control and Prevention and Control — Dengfeng, Henan, China (Recruiting)
• Henan Provincial Centre for Disease Control and Prevention — Zhengzhou, Henan, China (Recruiting)

Study contacts

• Study coordinator: Yanxia Wang

Conditions SARS-CoV-2 Infection