Speaking in a live teleconference with his cabinet ministers, Putin said the vaccine had gone through all the necessary checks. "A vaccine against coronavirus has been registered for the first time in the world this morning," Putin said, adding: "I know that it works quite effectively, it forms a stable immunity." "So we're the first to have registered. I hope our foreign colleagues' work will move as well, and a lot of products will appear on an international market that could be used," Putin said. The Russian President said one of his daughters has taken the vaccine; he said she had a slightly higher temperature, but that she now feels better. "I think that this way she participated in the experiment. After the first injection her temperature was 38 [degrees Celsius], the next day 37-something and that's it. After the second injection the temperature also got a bit higher but that's it, then it went back down. Now she feels well." Reports about Russia's vaccine have come amid concerns about its safety, effectiveness and allegations that the country has cut essential corners in its development.