The purpose of this double-blind, randomized, controlled study is to assess safety, reactogenicity, and preliminary immunogenicity of 202-CoV at multiple dose levels, administered as 2 injections (i.m) at 28 days apart in adult subjects 18 years of age and above.
Biological: 202-CoV low adjuvant dose
standard dose of 202-CoV with low dose CpG / alum adjuvant
Biological: 202-CoV low antigen dose
low dose 202-CoV with CpG / alum adjuvant
Biological: 202-CoV standard dose
standard dose 202-CoV with CpG / alum adjuvant
Other: Placebo
Normal saline solution
Inclusion Criteria:
- Healthy individuals aged 18-59 years as well as 60 years and above who can provide
legal identification (males and females are both required).
- Willing to participate in the study with informed consent prior to screening
- Negative in SARS-CoV-2 IgG and IgM test at screening.
- Women of childbearing potential must be using effective method of birth control for 14
days prior to the enrollment of the study vaccine/placebo and must agree to continue
such precautions during the study until 30 days after the second dose of the study
vaccine/placebo.
- Male subjects must agree to employ acceptable contraception from the day of first dose
of the study vaccine/placebo until 30 days after the second dose of the study
vaccine/placebo.
Exclusion Criteria:
- Confirmed or asymptomatic COVID-19 cases or SARS-CoV-2 infection(had positive in
SARS-CoV-2 nucleic acid test or serological test).
- Had a history of traveling or residence in domestic area of high and moderate pandemic
risk, overseas or epidemic areas, or had a history of contact with confirmed,
asymptomatic or suspected COVID-19 cases within the past 14 days;
- History of SARS;
- Received SARS-CoV-2 vaccines for emergency use or approved SARS-CoV-2 vaccines;
- Individuals involving a clinical study within 6 months prior to the screening visit;
or planning to participate in another clinical study during study period.
- Clinical laboratory abnormalities and with clinical significance judged by
investigator
- Individual's systolic blood pressure ≥ 150mmHg and/or diastolic blood pressure ≥
100mmHg at screening visit
- Axillary temperature >=37.3℃ prior to vaccination
- Individuals in other acute diseases, or in the acute phase of chronic diseases within
3 days prior to the signing of the informed consent form.
- Received immunoglobulin and/or blood product 3 months prior to the first vaccination.
- Presence of uncontrolled chronic pulmonary, cardiovascular, renal, hepatic,
neurologic, hematologic or metabolic (including diabetes mellitus) disorders, which
would include the potential subject in a high-risk category for SARS-CoV-2 infection
and/or its complications as judged by the investigator..
- Individuals with a history of severe allergic reaction (throat swelling, difficult in
breath, dyspnea, or shock).
- Individuals who have a history of severe adverse reaction associated with a vaccine or
severe allergic reaction [e.g., anaphylaxis to any component of the study vaccines (S
protein, Aluminum hydroxide, CpG adjuvant).
- Any autoimmune or immunodeficiency disease/condition [e.g. human immunodeficiency
virus (HIV) infection, Systemic lupus erythematosus (SLE)]
- Received immunoglobulin, blood-derived products within 3 months prior to the first
study vaccination.
- Abnormal coagulation function (such as coagulation factor deficiency, coagulation
disease, platelet abnormality) obvious bruises or coagulopathy.
- Pregnant women or breastfeeding women.
- According to the judgment of the investigator, subject has or had any other symptoms,
medical history and other factors that are not suitable for participating in this
clinical trial.
Xiangcheng Center for Disease Control and Prevention
Xuchang, China