More than two-thirds of cases of the Omicron variant of COVID-19 are among people who have been reinfected with the virus, a new study said Wednesday.Imperial College London researchers reported that around 3,582 people — or about 66% of participants in the study — who tested positive in January had already been infected with the virus, CNBC reported.An additional 7.5% of the infected participants said they believed they had previously had the virus but did not confirm that with a test.
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