The Coronavirus Delta Variant: Your Questions Answered

Rise of the “delta” variant of SARS-CoV-2. Percent of new COVID cases, delta in purple. Source: Trevor Bedford of Fred Hutchinson Institute, via Twitter

SARS-CoV-2 Delta and other “variants of concern”

By Amy Rogers, MD, PhD

People have been asking me questions about the “delta variant” that’s being discussed widely in the media. There’s quite a bit of good reporting on it, but here’s my summary of key points.

What is a variant?