Is virus mutation a cause for alarm?; There may be less to fear in reports from Britain and this country on an easier-spreading strain.

Media coverage

• Title	Is virus mutation a cause for alarm?; There may be less to fear in reports from Britain and this country on an easier-spreading strain.
  Media name/outlet	The Philadelphia Inquirer
  Country/Territory	United States
  Date	12/31/20
  Persons	Glenn Rall