COVID: Delta doubles hospital risk vs Alpha variant

— The Delta variant of the virus that causes COVID-19 doubles the risk of hospitalization compared to the Alpha variant it has supplanted as the dominant strain worldwide, researchers reported Saturday in The Lancet.

Three-quarters were completely unvaccinated, and 24 percent had only received one jab of a two-dose vaccine. All virus samples underwent whole-genome sequencing, the surest way to confirm which variant had caused the infection.Around one in 50 patients were admitted to hospital within 14 days of their first positive COVID-19 test.

“We already know that vaccination offers excellent protection against Delta,” said Gavin Dabrera, another lead author and a consultant epidemiologist at the National Infection Service, Public Health England.An earlier study from Scotland also reported a doubling in hospitalization risk with Delta over Alpha, suggesting that Delta causes more severe disease.

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