Concerns are rising about the spread of the Delta variant of COVID-19 in the U.S. as President Joe Biden falls short of his July 4 vaccine rollout goal and cases explode in the UK.
The highly contagious Delta variant first identified in India now represents at least 20 percent of COVID cases in the United States, where it is expected to become dominant in a matter of weeks, according to the CDC.
The highly contagious Delta variant first identified in India now represents at least 20 percent of COVID cases in the United States, where it is expected to become dominant in a matter of weeks, according to the CDC.
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