A new, possibly more infectious coronavirus variant, with an unusual number of mutations, had scientists sounding the alarm Friday and countries including the United States moving to impose travel restrictions as the world feared another setback on the long road out of the pandemic.
This latest variant arrives nearly two years after the first ominous warnings about a novel coronavirus that emerged from China. Now, even as the world grows increasingly weary of measures to contain the virus, this new threat is casting a shadow across holiday celebrations.
Categories: Health and Medicine

















