The coronavirus vaccine made by Pfizer and BioNTech provides strong protection against COVID-19 within about 10 days of the first dose, according to documents published Tuesday by the Food and Drug Administration before a meeting of its vaccine advisory group. President Donald Trump's administration is facing new scrutiny Tuesday after failing to lock in a chance to buy millions of additional doses of Pfizer's coronavirus vaccine, which has shown to be highly effective against COVID-19. That decision could delay the delivery of a second batch of doses until Pfizer fulfills other international contracts.
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