The study estimates that the risk of reinfection with the omicron variant is 5.4 times greater than that of the delta variant.
The study is yet to be peer-reviewed.
However, the data included only 24 hospitalizations of patients suspected of having the omicron variant, with researchers saying "hospitalisation data remains very limited at this time." The study is yet to be peer-reviewed.The data implies that protection against omicron reinfection afforded by previous infection may be as low as 19%, it said.
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