(1) MOSCOW, July 30, 2021 /PRNewswire/ -- The Russian Direct Investment Fund (RDIF, Russia's sovereign wealth fund) announces initial safety results of the world's first study of a combination between the AstraZeneca vaccine (developed jointly with the University of Oxford) and the first component of the Sputnik V vaccine (Sputnik Light vaccine based on human adenovirus serotype 26) in the Republic of Azerbaijan. The heterogeneous boosting approach ("vaccine cocktail" using human adenovirus serotype 26 as the first component and human adenovirus serotype 5 as the second component) was at the core of Sputnik V, the world's first registered vaccine against coronavirus. With this approach proving successful in creating a longer and more durable immunity against the coronavirus, RDIF took the lead in initiating partnerships with other vaccine producers to conduct joint studies of a combination of the first component of Sputnik V with foreign vaccines.