The British strain (coronavirus Variant B.1.1.7) of coronavirus is 64% more deadly than other mutations, concludes a study published in the scientific journal British Medical Journal.
“Those infected with the analyzed variant, identified in British testing centers, were between 32 and 104% (an estimated average of 64%) more likely to die than those infected by the previous variants,” according to the research.
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To study, experts observed almost 110,000 participants who were diagnosed with COVID-19 between October 2020 and January 2021 for 28 days.
The authors indicated that in a group of 54,906 patients infected with the British variant, there were 227 deaths, while in another group of 54,906 people infected by other strains there were 141 fatal outcomes.
The mortality risk coefficient is higher in the group with the British strain and is between 1.32 and 2.04. In turn, the absolute risk of mortality reaches 4.1 deaths per 1,000 cases.
However, the researchers do not exclude a possible selection bias, as well as an impact of pre-existing diseases that could have worsened the conditions of patients with COVID-19.
“In society, death from COVID-19 is still rare, but variant B.1.1.7 (British strain) increases the risk. Combined with its ability to spread rapidly, this makes B.1.1.7 a threat to which should be taken seriously,” said lead author Robert Challen.
On December 19, the health authorities of the United Kingdom confirmed the presence in the south of the British territory of a new strain of SARS-CoV-2 that spreads more quickly and, according to initial estimates, could be 70% more contagious.
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According to experts from the World Health Organization, the British strain of the coronavirus has become predominant in several European states, which is reflected in the contagion curve.