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U.S.’s First Case of U.K. Mutation Sparks Search for Source

  • New strain has been identified in more than a dozen countries
  • More transmissible than other strains, not seen more dangerous
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A 20-something man from Colorado is the first American known to be infected with a new variant of coronavirus that emerged this fall in the U.K., raising concern that a more transmissible strain could spread widely across the country.

The Colorado State Laboratory confirmed the patient had the mutated form of the virus, known as B.1.1.7, and informed the U.S. Centers for Disease Control and Prevention, Colorado Governor Jared Polis said in a statement Tuesday.