Russia's president says the vaccine - named Sputnik-V - has passed checks but experts are sceptical.
Russian President Vladimir Putin has said a locally developed vaccine for Covid-19 has been given regulatory approval after less than two months of testing on humans.
Mr Putin said the vaccine had passed all the required checks, adding that his daughter had already been given it.
However, director of Gamaleya Research Center (the developer of the vaccine) academician Gintsburg being asked about Putin's daughter answered that he never heard about it.
Mr Putin also said the vaccine had been given to one of his daughters, who was feeling fine despite a brief temperature increase.
"I think in this sense she took part in the experiment," Mr Putin said, without specifying which of his two daughters had received the vaccine.
"After the first injection her temperature was 38 degrees, the next day 37.5, and that was it. After the second injection her temperature went up slightly, then back to normal."