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Researchers at the University of Oxford built the vaccine using a kind of virus, called an adenovirus, that typically causes colds in chimpanzees. They genetically altered the virus so that it carried a gene for a coronavirus protein, which would theoretically train a person’s immune system to recognize the real coronavirus.
Around mid-December, 6.4 million doses of Pfizer’s COVID-19 vaccine will be shipped out across the United States in an initial push after it receives an expected emergency authorization, officials leading Operation Warp Speed, the administration’s push to fast-track a vaccine, said on a call with reporters on Tuesday.
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