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The companies have said they will produce up to 1.3 billion doses of the vaccine next year.

The U.S. Food and Drug Administration authorized the vaccine for emergency use on Friday (December 11), after Britain became the first country to begin deploying the shot outside of clinical trials earlier in the week.

Sahin said he expects the companies will receive conditional approval from the European Medicines Agency by the end of the month and can begin rolling out vaccine in European countries early next year.