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This is how long it could take to vaccinate all the adults in the US against Covid-19

The Trump administration aimed to vaccinate 20 million Americans against Covid-19 by the end of 2020 but fell short of that goal even at the end of the term. Now, President Biden's promise to administer 100 million shots in his first 100 days in office will be put to the test.
Read more on: cnn.com