Race for Covid-19 vaccine slows as U.S. officials tap the brakes

Race for Covid-19 vaccine slows as U.S. officials tap the brakes

Race for Covid-19 vaccine slows as regulators, top Warp Speed official tap the breaks

By HELEN BRANSWELL AND MATTHEW HERPER

ALEX BRANDON/AP

The FDA released strengthened rules for authorizing any vaccine, and a top official stressed manufacture supplies would be taken into account.

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