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                    COVID-19 Scan for Feb 24, 2022
                                        A seroepidemiologic survey of 7,010 people in Gauteng province, South Africa, before the SARS-CoV-2 Omicron variant outcompeted the Delta strain shows that 80% of those older than 50 years had antibodies against the virus, with most seropositivity likely generated by previous infection.In the study, published yesterday in the New England Journal of Medici