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SARS-CoV-2 Delta variant - Wikipedia
What do I need to know about the delta variant? - Mayo Clinic
Covid's Delta Variant: What We Know - The New York Times
The Highly Contagious Delta Variant Is On The Rise In The U.S. - NPR
COVID-19’s delta variant: What you need to know
The delta variant: Everything you need to know - NBC News
What to Know About the Delta Variant - The New York Times
What experts know so far about the delta variant - Science News
Effectiveness of Covid-19 Vaccines against the B.1.617.2 (Delta) Variant
What to Know About Breakthrough Infections and the Delta Variant