The 46-year-old fashion magnate and art collector successfully launched from the Baikonur cosmodrome in Kazakhstan along with his assistant Yozo Hirano, who will document the journey, as well as Russian cosmonaut Alexander Misurkin. Medicago’s plant-based vaccine trial shows 75.3% efficacy against Delta variant Canadian drug developer Medicago’s plant-based COVID-19 vaccine candidate, enhanced by GlaxoSmithKline’s booster, was 75.3% effective against the Delta variant of the virus in a late stage study, the two companies said on Tuesday.