Medicago, a biopharmaceutical company headquartered in Quebec City, and GlaxoSmithKline plc (GSK) announce positive efficacy and safety results from the global Phase 3 placebo-controlled efficacy study of Medicago’s plant-based COVID-19 vaccine candidate in combination with GSK’s pandemic adjuvant, conducted in over 24,000 subjects (adults 18 years and above) across six countries.