In this handout photo released by Gamaleya Scientific Research Institute of Epidemiology and Microbiology, a phial of Russian Sputnik-Light one-dose vaccine against the coronavirus disease (COVID-19) developed by the Gamaleya Scientific Research Institute of Epidemiology and Microbiology is pictured in Moscow, Russia. Sputnik-Light is based on the same special structures (carrier vectors) as the two-dose Russian Gam-COVID-VAK (trademark "Sputnik V") vaccine. Editorial use only, no archive, no commercial use.