- US Documents First Case of UK Coronavirus Variant : Coronavirus UpdatesNPR
- First case of highly infectious coronavirus variant detected in ColoradoThe Washington Post
- 1st US case of COVID-19 variant found in Colorado as Biden offers gloomy vaccine outlookKSL.com
- Colorado identifies first known case of UK coronavirus variant in USCNN
- U.S. confirms first case of the new Covid strain discovered in UKCNBC
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