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(WTTW News)

In all, 888 cases involving the variant, known as B.1.1.7, have been found in samples of COVID-19 positive tests from Illinois since Jan. 15, officials said. 

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(WTTW News)

The spread of the U.K. variant is helping to fuel a surge in COVID-19 cases in Chicago and across Illinois, according to Dr. Allison Arwady, the commissioner of the Chicago Department of Public Health.

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(WTTW News)

In all, 276 cases involving the United Kingdom variant have been found in samples of COVID-19 positive tests from Illinois since Jan. 15, officials said. 

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(WTTW News)

Twenty-nine cases of a COVID-19 variant first discovered in Southern California and believed to be more transmissible have been discovered in Illinois, state health officials announced Thursday.

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(WTTW News)

Twenty-five more cases of a COVID-19 variant first discovered in the United Kingdom that is believed to be more transmissible have been found in Illinois in the past seven days, according to data released Thursday by the Illinois Department of Public Health.

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(WTTW News)

A variant of the coronavirus first discovered in Brazil and believed to be more transmissible is present in Chicago, officials announced Friday. The person who tested positive for the variant had not traveled outside Illinois, according to officials.

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(WTTW News)

Twenty-seven more cases of a COVID-19 variant first discovered in the United Kingdom that is believed to be more transmissible have been discovered in Illinois in the past five days, according to data released Tuesday by the Illinois Department of Public Health.

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(WTTW News)

No new cases of two COVID-19 variants believed to be more transmissible have been discovered in Illinois in the past seven days, according to data released Thursday by the Illinois Department of Public Health.

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(WTTW News)

Twenty-two more cases of a COVID-19 variant first discovered in the United Kingdom that is believed to be more transmissible have been discovered in Illinois in the past seven days, according to data released Thursday by the Illinois Department of Public Health.

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(WTTW News)

A variant of the coronavirus first discovered in South Africa and believed to be more transmissible is present in Illinois, state health officials announced Thursday.

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(WTTW News)

The variant, known as B.1.1.7, was identified in samples of COVID-19 positive tests taken outside of Chicago and suburban Cook County for the first time, according to a spokesperson for the Illinois Department of Public Health.

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(WTTW News)

Eight more cases of a COVID-19 variant first discovered in the United Kingdom and believed to be more transmissible have been discovered in Chicago and suburban Cook County, state health officials announced Monday.

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(WTTW News)

A variant of the coronavirus first discovered in the United Kingdom and believed to be more transmissible is present in Chicago, city health officials announced Friday.

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This frame from streaming video from the Office of the Governor shows California Gov. Gavin Newsom, left, and Dr. Anthony Fauci during a conversation, Wednesday, Dec. 30, 2020. (Office of the Governor via AP)

California on Wednesday announced the nation’s second confirmed case of the new and apparently more contagious variant of the coronavirus, offering a strong indication that the infection is spreading more widely in the United States.

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Pedestrians wear masks while crossing an empty road at the intersection of Market Street and 15th Avenue during the evening rush hour Monday, Dec. 28, 2020, in downtown Denver. (AP Photo / David Zalubowski)

The first reported U.S. case of the COVID-19 variant that’s been seen in the United Kingdom has been discovered in Colorado, Gov. Jared Polis announced Tuesday, adding urgency to efforts to vaccinate Americans.

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Christmas shoppers in Oxford city centre England, Sunday Dec. 20, 2020. (Steve Parsons / PA via AP)

Reports from Britain and South Africa of new coronavirus strains that seem to spread more easily are causing alarm, but virus experts say it’s unclear if that’s the case or whether they pose any concern for vaccines or cause more severe disease.