COVAC Vaccine(University of Saskatchewan)

VIDO has developed a vaccine called COVAC-2.
The COVAC-2 study vaccine contains a portion of the SARS-CoV-2 spike protein, called S1. The spike protein is the part of the virus that is responsible for attaching to the surface of host cells. COVAC-2 contains a SWE adjuvant. An adjuvant is a compound that is added to a vaccine to help the vaccine produce a better immune response. The SWE adjuvant is similar to another adjuvant, MF59, that is found in influenza vaccines and MF59 containing vaccines have been given to millions of people around the world. The vaccine is expected to stimulate the body to make antibodies against the S1 protein. The antibodies will recognize the viral spike protein if the body is exposed to the virus and prevent severe COVID-19 illness. In animal studies, the immune response generated by the COVAC-2 vaccine was able to protect the vaccinated animals against a severe SARS-CoV-2 infection.
This is a Phase 1/2, placebo-controlled, observer-blind, age-stratified randomized, multicenter study to access the safety and immunogenicity of two dosing levels (10 and 25 µg S1 protein tested in parallel) administered once in healthy adults ≥18 of age who have received 2 doses of an authorized COVID-19 vaccine at least 6 months earlier. The study will also include an open-label exploratory study arm to evaluate safety and immunogenicity of a single COVAC-2 dose in previously SARS-CoV-2-infected individuals (Phase 2 only).

VIDO has developed a vaccine called COVAC-2.
The study vaccine contains a portion of the SARS-CoV-2 spike protein, called S1. The spike protein is the part of the virus that is responsible for attaching to the surface of host cells. COVAC-2 contains a SWE adjuvant. An adjuvant is a compound that is added to a vaccine to help the vaccine produce a better immune response. The SWE adjuvant belongs to a family of oil-based adjuvants that have been given to millions of people around the world as part of influenza vaccines. The COVAC-2 vaccine is expected to stimulate the body to make antibodies against the S1 protein. The antibodies will recognize the viral spike protein if the body is exposed to the virus and prevent or reduce the severity of COVID-19 illness. In animal studies, the immune response generated by the COVAC-2 vaccine was able to protect the vaccinated animals against a severe SARS-CoV-2 infection.
Phase 1 is a multi-centred trial of the COVAC-2 vaccine to be completed in Canada. It will be a randomized, observer-blinded, and placebo-controlled study to assess the safety and immunogenicity of three dosing levels (25, 50, and 100 µg protein) administered twice (4 weeks apart) in healthy adults 18 through 54 years of age (Phase 1a) and 55 years of age and older (Phase 1b).
Enrolment and vaccination of participants will be staggered over time based on participant age and vaccine dose. Approval will be sought from the Data Safety Monitoring Board (DSMB) to proceed with the second dose in each group, to enroll at each dose level, and to enroll in the older age group for each dose level.
Within the same age group, the 8 participants receiving the lowest dose are randomized with 4 participants receiving placebo; the 8 participants receiving the medium dose are randomized with 4 participants receiving placebo; and the 8 participants receiving the highest dose are randomized with 4 participants receiving placebo.
Within each dose level of 12 participants, it is proposed to immunize a first cohort of 3 participants (including at least 2 active vaccine participants) and pending no holding rule is met after 48 hours, to immunize the remaining 9 participants within that dose level.