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RIO DE JANEIRO, BRAZIL - The vaccines against the novel coronavirus are still in their trial phase. The most advanced, in phase 3, the last stage required by regulatory agencies before approval, are in their final stages of administration to volunteers and awaiting preliminary results until the end of the year.

However, despite the absence of their efficacy confirmed - that is, the guarantee that the vaccine is able to prevent Covid-19 - and safety, Russia, China, and the Arab Emirates have already begun administering the immunizer to their populations.

Russia was the first country to approve the registration of a

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