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In India, concern mounts over a variant called Delta Plus. (Published 2021)
By Sameer Yasir
Nearly all COVID deaths in the US are among unvaccinated, data shows
By Elinor Aspegren, N'dea Yancey-Bragg & Steven Vargas
Explainer: What is the Delta variant of coronavirus with K417N mutation?
By Bhargav Acharya & Shilpa Jamkhandikar
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Delta coronavirus variant: scientists brace for impact
By Ewen Callaway
AstraZeneca, Pfizer vaccines effective against Delta COVID-19 variants-study
By Aishwarya nair & Ludwig Burger