In May, President Joe Biden’s administration announced a new goal to administer at least one dose of Covid-19 vaccine to 70% of adults — and to have 160 million people fully vaccinated — in the United States by July 4. At the time, the pace of vaccinations was well on track to meet, and exceed, this goal. But vaccination rates have slowed to less than half of what they were at the time of the announcement, and the administration fell short of its goal by millions of people.
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