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Explained: Why WHO named Covid-19 variants first found in India as 'Kappa' and 'Delta' | India News - Times of India
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Characterization of SARS-CoV-2 Variants B.1.617.1 (Kappa), B.1.617.2 (Delta), and B.1.618 by Cell Entry and Immune Evasion | mBio
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