Delta variant makes up 6% of US COVID-19 cases
By Stephanie Soucheray
Big weddings may be allowed despite expected delay to lockdown easing
By Sebastian Payne, Sarah Neville & Chris Giles
What we know about the Covid-19 Delta variant first found in India
By Sheena Mckenzie & Ivana Kottasová
What makes the Delta covid-19 variant more infectious?
By Cassandra Willyard
The Highly Contagious Delta Variant Is On The Rise In The U.S.
By Jane Greenhalgh
How serious is Delta Covid variant for UK and do vaccines stop it?
By John Burn-Murdoch, Andy Bounds & Oliver Barnes