MOSCOW (AP) — Russian President Vladimir Putin says that a coronavirus vaccine developed in the country has been registered for use and one of his daughters has already been inoculated.

Speaking at a government meeting Tuesday, Putin said that the vaccine has proven efficient during tests, offering a lasting immunity from the coronavirus.

Putin emphasized that the vaccine underwent the necessary tests. He added that one of his two daughters has received a shot of the vaccine and is feeling well.

Russian authorities have said that medical workers, teachers and other risk groups will be the first to be inoculated.

Russia is the first country to register a coronavirus vaccine.

Many scientists in the country and abroad have been skeptical, however, questioning the decision to register the vaccine before Phase 3 trials that normally last for months and involve thousands of people.