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J&J Covid-19 vaccine lasts at least 8 months, protects against Delta variant, studies find
By Maggie Fox
The symptoms of the Delta variant appear to differ from traditional COVID symptoms. Here's what to look out for
By Lara J. Herrero
As others chill, L.A. County sounds alarms over Delta variant, masks
By Rong-Gong Lin II & Luke Money
Vaccinated among Delta deaths, but older and relatively few: UK data
By Marianne Guenot
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