variant

First US case of COVID-19 variant found in Colorado while Biden offers bleak vaccine outlook

Most infectious ‘B117’ variant of COVID-19 detected in Colorado

First case of the fast-moving United Kingdom COVID-19 variant found in Colorado

First case of COVID variant discovered in Colorado

Colorado health officials confirm discovery of highly infectious coronavirus variant, first in the US

Frustration with vaccine launch grows as new variant is reported in the U.S.

First case of COVID variant discovered in Colorado

First case of COVID variant discovered in Colorado

First case of COVID variant discovered in Colorado

First case of COVID variant discovered in Colorado

New Covid Variant Doesn’t Cause More Serious Diseases, Study Shows

New variant of the virus arrives in the USA while Biden promises all efforts