Here’s what the Centers for Disease Control and Prevention (CDC) says about the Delta variant, its symptoms, characteristics and other things to watch for: Viruses constantly change through mutation, ...

Differing strains of the coronavirus continue to appear around the world and a new COVID-19 variant, the so-called "Delta" variant, has health experts concerned. The variant, otherwise known as B.1617 ...

A fresh Covid variant is spreading across the UK and Ireland. The new strain, called Stratus, has two variants, XFG and XFG.3, with XFG.3 accounting for 40 per cent of cases in England as of June this ...