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1st US case of mutation of COVID-19 detected in Colorado
First case of highly infectious Covid-19 variant detected in Colorado
First U.S. case of new Covid-19 strain discovered in Colorado: Governor
US reports 1st case of UK COVID-19 variant l GMA
Colorado Guardsman has first U.S. case of COVID-19 variant
New COVID-19 Variant Found In Colorado Man Amid Vaccine Rollout Challenges | TODAY
Colorado officials identify first known US case of COVID-19 variant seen in UK
Colorado officials identify first known US case of COVID-19 variant seen in UK
Mutant COVID-19 Strain Detected In US For First Time
First Known U.S. Case of Coronavirus Variant Found in Colorado Man With No Travel History
U.S. confirms COVID-19 variant in Colorado
First cases of a new Covid-19 strain identified in the U.S.—What's known so far
