https://www.siliconvalley.com/2021/11/30/omicron-vs-delta-more-mutations-dont-necessarily-make-a-meaner-covid-19-virus/

The new Omicron variant of coronavirus, with its many mutations and seemingly quick spread in South Africa, is worrying scientists and government officials.

But doctors want to remind Americans that they’re already facing a pretty formidable coronavirus variant, and that’s Delta.