| Eligibility |
Inclusion Criteria:
1. Able to understand and comply with the study procedures, understand the risks involved
in the study, and provide written informed consent before the first study-specific
procedure;
2. Healthy volunteers aged above 18 years at time of screening;
3. Have received last COVID-19 vaccination more than 3 months ago (more than 90 days)
[Only Step 1]
4. Have had at least authorised primary COVID-19 vaccination(s) regardless of numbers of
booster. [Only Step 2]
5. The last authorised COVID-19 vaccination, the participants received, should be more
than 4 months (16 weeks) prior to the first EG-COVID or EG-COVARo vaccination. [Only
Step 2]
6. Participants must have a body mass index (BMI) between =18.5 and =30.0 kg/m2 at
screening;
7. Availability to volunteer for the entire study duration and be willing to adhere to
all protocol requirements;
8. Must have a negative urine pregnancy test on the day of dosing prior to each
vaccination;
9. Must agree not to donate blood or receive transfusion (including whole blood, plasma,
and platelet components).
10. Must agree to use highly effective, medically accepted double-barrier contraception
(both male and female partners) from screening until study completion (until 3 months
after second vaccination) as specified below in this criterion.
Highly effective double-barrier contraception is defined as use of a condom AND one of the
following:
1. Birth control pills (The Pill)
2. Depot or injectable birth control
3. IUD (Intrauterine Device)
4. Birth Control Patch (e.g., Ortho Evra)
5. NuvaRing®
6. Implantable contraception (e.g., Implanon)
7. Documented evidence of surgical sterilisation at least 6 months prior to screening,
i.e., tubal ligation for female or vasectomy for male Rhythm methods are not
considered as highly effective methods of birth control. Female participants and
female partners of male participants must use contraception from the time of informed
consent and for 90 days after last vaccination of study drug.
Female not of childbearing potential must be postmenopausal for =12 months.
Postmenopausal status will be confirmed through testing of follicle stimulating
hormone (FSH) levels = 40 IU/mL at screening for amenorrhoeic female participants.
Male participants must refrain from sperm donation from start of study and for 90 days
after the last vaccination of study drug.
Female participants who has had hysterectomy at least 6 months prior to screening must
provide documented evidence of surgical sterilisation and are not required to use
double barrier contraception where this is the usual and preferred lifestyle.
Participants who are in same-sex relationships are not required to use contraception.
Abstinence is acceptable where this is the usual and preferred lifestyle.
Exclusion Criteria:
1. Participant with the evidence of COVID-19 infection at screening because of one or
more of the following:
1. Positive for COVID-19 when performing RT-PCR with upper respiratory tract
samples; (oropharyngeal/nasopharyngeal swab) (However, if symptoms of cough or
sputum are present, additional RT-PCR is performed using a lower respiratory
tract sample (sputum), and registration is possible if all are negative)
2. History of COVID-19 [Step 1 only]; 2. Participant who has the history of COVID-19
infection within 6 months from the first EG-COVID or EG-COVARo vaccination; 3.
Close contact with a person infected with COVID-19 within 2 weeks prior to the
first EG-COVID or EG-COVARo vaccination; 4. Participants with COVID-19 specific
binding antibody titer 1000 IU/mL or less or over 3000 IU/mL (= 1000 IU/mL or >
3000 IU/mL) measured by a specific IgG enzyme-linked immunosorbent assay (ELISA)
[Step 2 only]; 5. Participant who is considered to have COVID-19 symptoms because
of one or more of the following within 2 weeks prior to the first EG-COVID or
EG-COVARo vaccination;
1. According to the doctor's opinion, COVID-19 is suspected as a clinical symptom;
2. History of travel outside of the country and have clinical symptoms of COVID-19;
6. Healthcare workers who can participate in the treatment of COVID-19 patients,
or those at high risk of exposure to SARS-CoV-2 (screening clinics and emergency
room workers, workers related to COVID-19 prevention, workers involved in
collecting or analysing COVID-19 samples, etc.); 7. Clinically significant
abnormalities in laboratory tests, electrocardiogram (ECG), or chest X-rays
performed at the screening; 8. Positive test for hepatitis C antibody (HCV),
hepatitis B surface antigen (HbsAg), human immunodeficiency virus (HIV) antibody,
or Syphilis antibody at Screening; 9. Is acutely febrile or ill 72 hours prior to
the first vaccination;
- Fever is defined as a body temperature =38.0°Celsius / =100.4°Farenheit.
- Illness is defined as symptoms due to other infectious diseases (Cough,
shortness of breath, chills, muscle pain, headache, sore throat, loss of
smell, or loss of taste, etc.) 10. History of a diagnosis or condition that,
in the judgment of the Investigator, may affect study endpoint assessment or
participant safety, specifically:
1. Respiratory system: asthma, chronic obstructive pulmonary disease (COPD), daily
medication administration for active tuberculosis or latent tuberculosis,
received treatment due to worsening of respiratory diseases within 5 years prior
to the first vaccination
2. Serious cardiovascular disease: Congestive heart failure, coronary artery
disease, myocardial infarction, uncontrolled hypertension, myocarditis,
pericarditis, etc.
3. Nervous system: Epilepsy, seizure (Within 3 years before the first vaccination),
migraine, stroke, encephalopathy, Guillain-Barré syndrome, encephalomyelitis,
transverse myelitis, etc.
4. Diagnosis of malignancy within the previous 10 years before the first vaccination
(except basal cell and squamous cell carcinoma)
5. Autoimmune diseases, including autoimmune hypothyroidism or psoriasis
6. Immunodeficiency disease
7. Hepatobiliary, renal, endocrine, urinary, musculoskeletal or other disorders
judged to be clinically significant by the investigator 11. History of SARS-CoV
or MERS-CoV infection; 12. History of allergy or hypersensitivity reaction to any
components of study vaccine; 13. History of serious adverse reaction, allergy or
hypersensitivity reaction to any vaccination; 14. History of platelet-related
disease or hemorrhagic disease, or have a history of severe bleeding or bruising
after intramuscular injection (IM) or venipuncture, or are taking anticoagulants;
(However, according to the judgment of the investigators, there can be involved
when using a low dose of an anticoagulant (eg, aspirin at 100mg/day or less)) 15.
History of urticaria within 5 years before the first vaccination; 16. History of
hereditary or idiopathic angioneurotic edema; 17.History of organ or bone marrow
transplantation; 18. History or suspicion of illegal substance use or alcohol
abuse within the past 6 months before the first vaccination; 19. Receipt of
chronic use of the following drugs within 6 months before the first vaccination:
1. Immunosuppressants and immunomodulators: Azathioprine, cyclosporine, interferon,
G-CSF, tacrolimus, everolimus, sirolimus, cyclophosphamide, 6-mercaptopurine,
methotrexate, rapamycin, leflunomide, etc.
2. Systemic steroids: When a dose exceeding 10 mg/day and has been used for more
than 14 consecutive days based on prednisolone (However, external steroids, nasal
sprays, inhalants, and eye drops are permitted regardless of the dosage) 20.
History of dependent psychotropic or opioid drug within 6 months before the first
vaccination; 21. Participated in an interventional clinical study except for
EG-COVID-102 study (step 1) within 6 months prior to the screening visit or plans
to do so while participating in this study; 22. Participant has been vaccinated
or plan to vaccinate any within 4 weeks before/after each study vaccine; 23.
Participant has received immunoglobulin or blood-derived products within 3 months
prior to the first vaccination, or those who plan to administer it during the
study; 24. Participant scheduled for surgery while participating in this study;
25. Pregnant or lactating at screening or planning to become pregnant (self or
partner) at any time during the study, including the follow-up period; 26. Any
other reason that, in the opinion of the investigator, unlikely to comply with
the clinical study protocol or is unsuitable for any other reason.
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