Russian President Vladimir Putin said on Tuesday that Russia had become the first country to grant regulatory approval to a COVID-19 vaccine after less than two months of human testing, a move Moscow likened to its success in the Cold War-era space race.

The vaccine, which will be called "Sputnik V" in homage to the world's first satellite launched by the Soviet Union, has however not yet completed its final trials.

Moscow's decision to grant approval before then has raised concerns among some experts.