Posted in Uncategorized Explainer: What is the Delta variant of coronavirus with … November 20, 2022 It is a sub-lineage of the Delta variant first detected in India and has acquired the spike protein mutation called K417N which is also found in the Beta variant first identified in South Africa. https://www.reuters.com/business/healthcare-pharmaceuticals/what-is-delta-variant-coronavirus-with-k417n-mutation-2021-06-23/