Spread of Covid variants fuels concern in Michigan as state reopens
by Erum Salam from US news | The Guardian on (#5FK7D)
Observers call for caution with highly contagious UK variant present in 31 counties
The US is turning a corner on Covid, with 2m vaccination shots administered each day since early March. But some states are facing worrying rises of both regular cases and cases of virus variants.
Related: 'People are champing at the bit': California is reopening - but how fast is too fast?
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