Thousands of cases of a worrying variant have been reported in the US. These states have the highest numbers

Thousands of cases of the B.1.1.7 variant have been reported across the US, and experts fear the strain may fuel another Covid-19 surge as states race to vaccinate more residents.Thousands of cases of the B.1.1.7 variant have been reported across the US, and experts fear the strain may fuel another Covid-19 surge as states race to vaccinate more residents.