Top news
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
All coverage
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
Some Vaccinated People Are Dying of Covid-19. Here's Why Scientists Aren't Surprised.
By Jason Douglas & Stephen Fidler
What to Know About the Delta Coronavirus Variant
By Rachel Nania
Delta Variant’s Spread Prompts Reconsideration of Mask Guidance
By Apoorva Mandavilli, Shawn Hubler & Roni Caryn Rabin
What's the 'Delta plus' variant? And can it escape vaccines? An expert explains
By Sunit Kumar Singh