Vaccination rates plunge in some states, slowing progress in the fight to end Covid-19
Covid-19 vaccinations have slowed to a trickle in some states, leaving unvaccinated Americans vulnerable to new variants and threatening the chances of reaching herd immunity. The US reached its peak of daily vaccinations on April 1, with more than 4.3 million people inoculated in one day, according to data from the US Centers for Disease
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