MOSCOW — Russia has become the first country in the world to approve a vaccine for the coronavirus, President Vladimir V. Putin announced on Tuesday, though global health authorities say the vaccine has yet to complete critical, late-stage clinical trials to determine its safety and effectiveness.

Mr Putin said the vaccine had passed all the required checks, adding that his daughter had already been given it.

Officials have said they plan to start mass vaccination in October.

Experts have raised concerns about the speed of Russia's work, suggesting that researchers might be cutting corners.

Amid fears that safety could have been compromised, the World Health Organization (WHO) urged Russia last week to follow international guidelines for producing a vaccine against Covid-19.

News that Russia has registered the first vaccine to treat COVID-19 before starting and completing Phase 3 trials was greeted with alarm on Tuesday, with experts concerned it may come with safety issues that could stoke antivaccination and anti-science sentiment.

President Vladimir Putin announced the news of the vaccine at a government meeting, The Wall Street Journal reported, following accelerated trials conducted by the Gamaleya Institute for Epidemiology and Microbiology in Moscow in collaboration with the Defense Ministry.