Russia claims it will start a mass vaccination programme this October. Russian officials say they've tested a Covid vaccine that is both safe and effective.
Russian media quoted [health minister] Mikhail Murashko as saying that doctors and teachers would be the first to receive the vaccine.
Reuters, citing anonymous sources, said Russia's first potential vaccine would be approved by regulators this month.
However, some experts are concerned at Russia's fast-track approach.
On Friday, the leading infectious disease expert in the US, Dr Anthony Fauci, said he hoped that Russia - and China - were "actually testing the vaccine" before administering them to anyone.
Dr Fauci has said that the US should have a "safe and effective" vaccine by the end of this year.