GRAd-COV2 vaccine provides potent and durable humoral and cellular immunity to SARS-CoV-2 in randomized placebo-controlled phase 2 trial. The ongoing severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic and heterologous immunization approaches implemented worldwide for booster doses call for diversified vaccine portfolios. GRAd-COV2 is a gorilla adenovirus-based COVID-19 vaccine candidate encoding prefusion-stabilized spike. The safety and immunogenicity of GRAd-COV2 is evaluated in a dose- and regimen-finding phase 2 trial (COVITAR study, ClinicalTrials.gov: NCT04791423) whereby 917 eligible participants are randomized to receive a single intramuscular GRAd-COV2 administration followed by placebo, or two vaccine injections, or two doses of placebo, spaced over 3 weeks. Here, we
Study of GRAd-COV2 for the Prevention of COVID-19 in Adults Multicenter Study assessing the safety, efficacy, and immunogenicity of the candidate vaccine GRAd-COV2, compared to placebo, for the prevention of COVID-19. Participants will be adults ≥ 18 years of age who are healthy or have medically stable chronic diseases and are at increased risk for SARS-CoV-2 acquisition and COVID-19 . In the phase II part approximately 900 participants will be randomized in a 1:1:1 ratio to receive i) 2 repeated (21 days apart) intramuscular (IM) doses of GRAd-COV2 at 1x10^11 viral particle (vp) (n = approximately 300 subjects) ii) 1 single IM dose of GRAd-COV2 at 2x10^11 vp plus 1 dose of placebo after 21 days (n= approximately 300 subject) or 2 doses of placebo (n = approximately 300 subjects) on day 1
Phase I Study to Assess the Safety and Immunology of a COVID-19 Vaccine With GRAd-COV2 Vaccine RT-CoV-2 is a Phase I, open-label, dose escalation multicenter clinical trial to assess safety and immunogenicity of the candidate Coronavirus disease (COVID-19) vaccine GRAd-COV2 in Italian healthy volunteers aged 18-55 years and 65-85 years inclusive. GRAd-COV2 is based on a novel replication defective Gorilla Adenovirus and encodes for SARS-COV-2 Spike protein. RT-CoV-2 is a Phase I, open-label, dose escalation multicenter clinical trial to assess safety and immunogenicity of the candidate Coronavirus disease (COVID-19) vaccine GRAd-COV2 in Italian healthy volunteers aged 18-55 years and 65-85 years inclusive. GRAd-COV2 is based on a novel replication defective Gorilla Adenovirus and encodes
-defective gorilla adenovirus-vectored vaccine encoding the pre-fusion stabilized Spike (S) protein of SARS-CoV-2. We show that our vaccine candidate, GRAd-COV2, is highly immunogenic both in mice and macaques, eliciting both functional antibodies that neutralize SARS-CoV-2 infection and block Spike protein binding to the ACE2 receptor, and a robust, T helper (Th)1-dominated cellular response. We show here that the pre-fusion stabilized Spike antigen is superior to the wild type in inducing ACE2-interfering, SARS-CoV-2-neutralizing antibodies. To face the unprecedented need for vaccine manufacturing at a massive scale, different GRAd genome deletions were compared to select the vector backbone showing the highest productivity in stirred tank bioreactors. This preliminary dataset identified GRAd-COV2