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CDC data shows highly transmissible delta variant is now the dominant Covid strain in the U.S.
By Berkeley Lovelace & Berkeley Lovelace Jr.
Should fully vaccinated people continue to wear masks? Experts weigh in.
By Erika Edwards
All coverage
US sends Covid-19 surge team to southwest Missouri after Delta variant fuels rise in cases and hospitalizations
By Aya Elamroussi
Why is Delta such a worry? It's more infectious, probably causes more severe disease, and challenges our vaccines
By Michael Toole
Delta plus variant of SARS-CoV-2: What do we know so far?
By Yella Hewings-martin
Delta variant causing 80% of new COVID cases in 4 states, 96% in MO
By Catherine Schuster-Bruce
Map: Tracking the Delta variant
By Mohammed Haddad
Covid's delta variant: What you need to know to protect yourself - The Washington Post
By Lindsey Bever, Kim Bellware & Lateshia Beachum
Here's what you need to know about the lambda Covid variant
By Holly Ellyatt
Is it more infectious? Is it spreading in schools? This is what we know about the Delta variant and kids
By Margie Danchin, Fiona Russell & Archana Koirala