THE DEVELOPMENT OF COVID-19 VACCINES WAS AIDED BY A RAPIDLY SPREADING VIRUS THAT PROVIDED AN AMPLE SUPPLY OF POTENTIAL CLINICAL TRIAL PARTICIPANTS.
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carousel 12 Page 2 Page 4Narration
THE DEVELOPMENT OF COVID-19 VACCINES WAS AIDED BY A RAPIDLY SPREADING VIRUS THAT PROVIDED AN AMPLE SUPPLY OF POTENTIAL CLINICAL TRIAL PARTICIPANTS.
carousel 12 Page 2 Page 4