Full CoverageAll coverage
Why is Delta such a worry? It’s more infectious, probably causes more severe disease, and challenges our vaccines
By Michael Toole
Coronavirus Updates: Covid News: Biden Calls For New Vaccination Push (Published 2021)
By Michael D. Shear, Sheryl Gay Stolberg & Azi Paybarah
US sends Covid-19 surge team to southwest Missouri after Delta variant fuels rise in cases and hospitalizations
By Aya Elamroussi
Global COVID-19 deaths hit 4 million amid rush to vaccinate
By Joshua Goodman
Here's what you need to know about the lambda Covid variant
By Holly Ellyatt
Map: Tracking the Delta variant
By Mohammed Haddad