The Russian Ministry of Defense said this Wednesday, in an official communication, that the Covid-19 vaccine has been clinically tested in a group of volunteers and is safe.

According to her reports, 18 people who had no other health problems or chronic diseases became part of this trial.

"The test results " allow us to speak with confidence about the safety and tolerance of the vaccine, " the ministry said in a statement.

The ministry, in fact, did not say how effective the vaccine might be, but a doctor who took part in the test said all young people who received the vaccine were already protected against the coronavirus.

" Their immunity is working well, antibodies are being created, so they are protected from the coronavirus," said researcher Svetlana Volchikhina in a video released by the Ministry of Defense.

Defense Minister Sergei Shoigu told President Vladimir Putin at the height of the epidemic in late May that researchers were preparing a vaccine, in collaboration with scientists at the Gamaleya Institute in Moscow.

All the volunteers who took part were isolated at the Burdenko Military Hospital in Moscow on June 18, when they were vaccinated, and since then they have undergone daily check-ups.

The Ministry of Defense reported that " for 28 days after vaccination, the vital signs of the volunteers remained within normal limits".

" We now know we are 100 percent protected," said Yury, a military man who took part in the test, leaving the hospital.

A second group of participants who were vaccinated on June 23 are currently in isolation in the hospital under medical supervision.

The Ministry of Defense said it expects the clinical trials to be fully completed by the end of July.

Russia ranks fourth in the world in terms of coronavirus infections, with 746,369 cases and nearly 12,000 deaths, health officials said on Wednesday.