According to Kirill Dmitriev, head of Russia’s Direct Investment Fund that bankrolled the effort, a vaccine developed by the Gamaleya research institute in Moscow may be approved in days, before scientists complete what’s called a Phase 3 study. That final-stage study, usually involving tens of thousands of people, is the only way to prove if an experimental vaccine is safe and really works.

Scientists worldwide are sounding the alarm that the headlong rush could backfire.

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