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The current state of Covid-19 in the United States, in 5 charts
By Elliott Ramos
Vaccinated and Confused? Answers About Masks, the Delta Variant and Breakthrough Infections (Published 2021)
By Tara Parker-Pope
Moderna Says Studies Show Its Vaccine Is Effective Against The Delta Variant
By Laurel Wamsley
Vaccinated among Delta deaths, but older and relatively few: UK data
By Marianne Guenot
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The symptoms of the Delta variant appear to differ from traditional COVID symptoms. Here's what to look out for
By Lara J. Herrero
J&J Covid-19 vaccine lasts at least 8 months, protects against Delta variant, studies find
By Maggie Fox
As others chill, L.A. County sounds alarms over Delta variant, masks
By Rong-Gong Lin II & Luke Money
Europe wants to stop the Covid delta variant. But experts say it may already be too late
By Holly Ellyatt
What to Know About the Delta Coronavirus Variant
By Rachel Nania
Some Vaccinated People Are Dying of Covid-19. Here's Why Scientists Aren't Surprised.
By Jason Douglas & Stephen Fidler
Delta Variant’s Spread Prompts Reconsideration of Mask Guidance
By Apoorva Mandavilli, Shawn Hubler & Roni Caryn Rabin