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Your chance of getting Covid-19 again is much higher than if you had the Delta and Beta variants, scientists have found.

South africaSouth africanJonathan dushoffKoleka mlisanaMichelle groomeAlet pretoriusJuliet pulliamVan schalkwykSiobhan johnstoneCheryl cohenHarry moultrieNevashan govenderMcmaster universityNational health laboratory serviceWorld health organizationAfrican centre for epidemiological