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AstraZeneca, Pfizer vaccines effective against Delta COVID-19 variants-study
By Ludwig Burger & Aishwarya nair
Covid Delta strain risks spreading 'like wildfire' among unvaccinated in US
By John Burn-Murdoch & Nikou Asgari
Missouri sees rise in severe COVID-19 cases among the young, unvaccinated as delta variant spreads
By Arielle Mitropoulos & Morgan Winsor
Nearly all COVID deaths in US now among unvaccinated; Sydney tightens pandemic restrictions amid outbreak: Latest ...
By Elinor Aspegren, Steven Vargas & N'dea Yancey-Bragg
Covid's Delta Variant: What We Know
By Emily Anthes
COVID-19 and the delta variant: Which vaccines are effective?
By Yella Hewings-martin
Delta Covid variant has a new mutation called 'delta plus': Here's what you need to know
By Holly Ellyatt
India says new COVID variant is a concern
By Uday Sampath Kumar & Bhargav Acharya