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SARS-CoV-2 Delta variant doubles hospital risk, study shows

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The SARS-CoV-2 Delta (B1617.2) variant poses twice the risk of COVID-19 hospitalization as the Alpha (B117) strain, according to a large study late last week in The Lancet Infectious Diseases.The study, led by researchers at Public Health England, is the first to report the hospitalization risks of the Delta and Alpha variants and the largest whole-genome SARS-CoV-2 sequencing effort in a high-income country, the authors said.

It involved 43,338 English COVID-19 patients of all ages infected with either variant from Mar 29 to May 23, 2021.Of all patients, 8,682 (20%) were infected with the Delta variant, with the remainder infected with the Alpha strain.

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