A leading scientist who identified a new coronavirus variant in Nigeria has cautioned against comparisons with new strains found in South Africa and the UK.¬†Christian Happi, head of the African Centre of Excellence for Genomics and Infectious Diseases in Nigeria, said more studies were needed to see whether the country’s new variant was linked to a recent spike in infections. Nigeria’s new strain was found in two out of two hundred samples collected between August and October. South Africa said its new variant could explain a recent increase especially affecting younger people.