An Efficacy, Immunogenicity and Safety Study Investigating an Adjuvanted SARS-CoV-2 Influenza Vaccine to Protect Against COVID-19 in Adults Over Aged 18 Years-old and Older

A Phase 2/3 Randomised, Observer-blind, Placebo-controlled, Multi-centre Study to Evaluate the Efficacy, Immunogenicity and Safety of the Adjuvanted SARS-CoV-2 Subunit Vaccine in Adults Aged 18 Years and Above

The primary efficacy objective is to demonstrate the efficacy of aCoV2 versus a placebo to prevent the first occurrence of virologically-confirmed symptomatic COVID 19 according to the European Centre for Disease Prevention and Control (ECDC) COVID 19 case definition. The co-primary efficacy objective is to demonstrate the efficacy of aCoV2 versus a placebo to prevent virologically confirmed symptomatic COVID 19 defined by the US Food and Drug Administration (FDA) guidance.

INCLUSION CRITERIA:

1. Individuals 18 years of age or older on the day of informed consent.
2. Individuals who have voluntarily given written informed consent after the nature of the study has been explained according to local regulatory requirements, prior to study entry.
3. Individuals who can comply with study procedures including follow-up .
4. Females of non-childbearing potential or females of childbearing potential who are using an effective birth control method which they intend to use for at least 30 days after the last study vaccination.

EXCLUSION CRITERIA:

1. Females of childbearing potential3 who are pregnant, lactating, or who have not adhered to a specified set of contraceptive methods from at least 30 days prior to informed consent and who do not plan to do so until 2 months after the last vaccination.

2. Progressive, unstable or uncontrolled clinical conditions such as decompensated congestive heart failure, cardiac arrhythmia, unstable angina, acute coronary syndrome or any major organ failure

3. Hypersensitivity, including allergy, to any component of vaccine (including the adjuvant, MF59C.1), medicinal products or medical equipment whose use is foreseen in this study.

4. Clinical conditions representing a contraindication to intramuscular vaccination and blood draws.

5. History of Guillain-Barré Syndrome or acute disseminated encephalomyelitis (ADEM)

6. Abnormal function of the immune system resulting from:

   1. Clinical conditions.
   2. Systemic administration of corticosteroids (PO/IV/IM) at any dose for more than 14 consecutive days within 90 days prior to informed consent. Topical, inhaled and intranasal corticosteroids are permitted. Intermittent use (one dose in 30 days) of intra-articular corticosteroids are also permitted.
   3. Administration of antineoplastic and immunomodulating agents or radiotherapy within 90 days prior to informed consent.

7. Received immunoglobulins or any blood products within 90 days prior to informed consent

8. Received an investigational or non-registered medicinal product within 30 days prior to informed consent or an investigational coronavirus vaccine (SARS-CoV; MERS-CoV) at any time prior to informed consent

9. Individuals who received any other vaccines within 14 days (for inactivated vaccines) or 28 days (for live vaccines) prior to enrolment in this study or who are planning to receive any vaccine within 28 days from the study vaccines.

10. Acute (severe) febrile illness (see Section 4.3)

11. Known positive serology for human immunodeficiency virus (HIV) type 1 or 2 antibodies, hepatitis B virus surface antigen, or hepatitis C virus antibody

12. Acute COVID-19 infection (positive COVID-19 test: nasopharyngeal swab) at screening, or Day 1

13. Study personnel or immediate family or household member of study personnel

14. Any other clinical condition that, in the opinion of the investigator, might interfere with the results of the study or pose additional risk to the subject due to participation in the study