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The risk of reinfection from the Omicron coronavirus variant is three times higher than for any previous strain, according to a South African study of infections since the start of the pandemic.
The finding provides evidence of Omicron’s “ability to evade immunity from prior infection,” according to the authors, Juliet Pulliam of the South African Center for Epidemiological Modelling and Analysis and Harry Moultrie of the National Center for Communicable Diseases.
The study was based on data collected through South Africa’s health system on about 2.8 million confirmed coronavirus infections between March 2020 and November 27, the authors wrote in an emailed
