The primary confirmed U.S. case of the extra contagious British variant has been present in Colorado.

A case of the contagious variant of coronavirus, first discovered in the UK, was found in Colorado on Tuesday, Governor Jared Polis said. It is the first confirmed case of the variant in the United States.

The variant was discovered in a man in his twenties with no travel history, Mr Polis said. The man was isolated in Elbert County, southeast of Denver, he said.

“There’s a lot we don’t know about this new variant of Covid-19, but scientists in the UK are warning the world that it’s far more contagious,” Polis said in a statement. “The health and safety of Coloradans is our top priority and we will monitor this case as well as any Covid-19 indicators very closely.”

Scientists are concerned about these variants, but not surprised by them. It is normal for viruses to mutate, and most of the mutations in the coronavirus have been shown to be minor.

“This shouldn’t be a cause for panic,” said William Hanage, an epidemiologist at Harvard University. “But it is an occasion to redouble our efforts to prevent the virus from getting a chance to spread.”

Earlier this month, British researchers observed that the variant was becoming more common in parts of the UK. Your subsequent research suggests that the variant known as B.1.1.7 spreads more easily than others in circulation.

It is not yet clear why B.1.1.7 transmits more easily. The line has accumulated 23 mutations since splitting off from other coronaviruses. The researchers are studying some of the mutations to see if the viruses can enter cells more easily or make more copies of themselves.

There is no evidence that an infection with B.1.1.7 is more likely to lead to a severe case of Covid-19 or increase the risk of death. However, the speed at which the variant appears to be spreading could lead to more infections – and therefore more hospitalizations.

The UK government reacted to the emergence of B.1.1.7 by restricting the movement of people and the size of the gatherings. In a preliminary study, UK researchers found that schools may need to be closed and vaccination programs aggressively accelerated to prevent a huge surge in cases.

Cases of the variant have been found in several countries, including Japan, Spain, France, and Canada. Officials in India said Tuesday they had found six cases of the virus variant, which were first discovered in the UK.

Countries around the world have introduced stricter protocols for travelers entering from the UK. A new rule in the United States requiring incoming travelers from the UK – including American citizens – to provide proof of a negative coronavirus test upon entry went into effect on Monday.

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