UK health authorities are reporting 90 percent of new coronavirus infectionsare due to the Delta variant. In the US the Centers for Disease Control and Prevention warn the variant will likely become predominant in the coming months. What is the Delta variant, why is it posing such a problem, and will our vaccines still provide protection against it?
The Delta variant was first recorded in India in December 2020. It is one of three lineages of the B.1.617 variant and by June 2021 had been detected in around 80 countries.