Gam-COVID-Vac is being developed by Russia’s Gamaleya Research Institute of Epidemiology and Microbiology.Current Status: The vaccine is under a phase I/II trial in Russia.Mode of Action: Gam-COVID-Vac is a genetically engineered vaccine that contains a combination of two replication-defective adenovirus vectors Ad5 and Ad26.Next Milestone:The trial is expected to be completed by August 2020.