B.1.1.7 strain

Troubling variant reaches more than 11,000 cases in the U.S.

These states have the highest numbers

Originally Published: 01 APR 21 02:35 ET Updated: 01 APR 21 16:27 ET By Christina Maxouris and Holly Yan, CNN (CNN) -- Thousands of cases of the B.1.1.7 strain have been reported across the United States, and experts fear the…