A dangerous Covid-19 variant on the rise could cause outbreaks in US states with lower vaccination rates, expert says
The Delta variant is quickly on its way to becoming the dominant strain of Covid-19 in the US, raising concerns that outbreaks could hit vulnerable communities come fall. Currently 10% of Covid-19 infections in the US can be attributed to the variant, also called the B.1.617.2 variant, but that proportion is doubling every two weeks,
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