Top news
US sends Covid-19 surge team to southwest Missouri after Delta variant fuels rise in cases and hospitalizations
By Aya Elamroussi
Should fully vaccinated people continue to wear masks? Experts weigh in.
By Erika Edwards
Virtually all new Covid deaths and hospitalizations are among unvaccinated people, White House says
By Kevin Breuninger
All coverage
Why is Delta such a worry? It's more infectious, probably causes more severe disease, and challenges our vaccines
By Michael Toole
The lambda COVID-19 variant is now spreading in Canada — here's what you need to know
By Lauren Pelley & Michelle Meiklejohn
Delta plus variant of SARS-CoV-2: What do we know so far?
By Yella Hewings-martin
Map: Tracking the Delta variant
By Mohammed Haddad
Here's what you need to know about the lambda Covid variant
By Holly Ellyatt
Coronavirus Updates: Covid News: Biden Calls For New Vaccination Push (Published 2021)
By Michael D. Shear, Carl Zimmer & Sheryl Gay Stolberg
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