The risk of needing to stay in hospital for patients with the Omicron variant of COVID-19 is 40% to 45% lower than for patients with the Delta variant, according to research by London's Imperial College published on Wednesday.
"Overall, we find evidence of a reduction in the risk of hospitalization for Omicron relative to Delta infections, averaging over all cases in the study period," the researchers said of the study, which analyzed data from PCR-test confirmed cases in England between Dec. 1 and Dec. 14.
However, they added that the reductions in hospitalization must be balanced against the larger risk of infection with Omicron, due to the reduction in protection provided by both vaccination and natural infection.
Britain reported more than 100,000 new cases of COVID-19 on Wednesday for the first time since widespread testing was available.
They said their estimates from the research suggested that people who had received at least two vaccine doses remained substantially protected against hospitalization, even if protection against infection has been largely lost against the Omicron variant.