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Hear Fauci's advice on how to avoid getting Covid variant
02:01 - Source: CNN
CNN  — 

The coronavirus variant B.1.1.7, which was first identified in the United Kingdom, is associated with an estimated 64% higher risk of dying from Covid-19, suggests new research published in a peer-reviewed journal.

A sample of people in the UK infected with the variant appeared to be between 32% and 104% – so around a probable 64% – more likely to die than those infected with the previously circulating variants, according to the study published in the medical journal the BMJ on Wednesday.

The variant was originally found to be more easily transmissible and the new data support claims from UK officials, based on preliminary data, that the variant may be more deadly, as well.

The researchers, from various institutions in the UK, analyzed data on more than 100,000 patients who tested positive for Covid-19 between October through January, and were followed up with until mid-February.

The researchers took a close look at whose tests detected the variant compared with those from previously circulating variants.

The study showed that the new variant was associated with 227 deaths in a sample of 54,906 patients – compared with 141 deaths among the same number of patients infected with previous strains.

“In the community, death from COVID-19 is still a rare event, but the B.1.1.7 variant raises the risk. Coupled with its ability to spread rapidly this makes B.1.1.7 a threat that should be taken seriously,” Robert Challen, lead author of the study from the University of Exeter in the UK, said in a news release on Wednesday.

More research is needed to determine what exactly happens in the course of infection caused by the B.1.1.7 variant that may lead to an increased risk of death, Dr. Amesh Adalja, a senior scholar at the Johns Hopkins University Center for Health Security, told CNN on Wednesday. In the study, the greater risk of death associated with the variant emerges around two weeks in the course of a patient’s Covid-19 illness.

“There is a clear separation that occurs two weeks into that – so I would want more understanding of what the authors think that might be caused from,” said Adalja, who was not involved in the new study.

“Could it be that they’re getting bacterial infections, because they’re in the hospital longer? Could it be they’re more likely to have blood clots? What complication is causing that delay in death?” Adalja said. “That’s what I thought was most interesting.”