Two sources: https://www.cogconsortium.uk/wp-content/uploads/2020/12/Report-1_COG-UK_19-December-2020_SARS-CoV-2-Mutations.pdf https://www.cogconsortium.uk/wp-c

Two sources: https://www.cogconsortium.uk/wp-content/uploads/2020/12/Report-1_COG-UK_19-December-2020_SARS-CoV-2-Mutations.pdf https://www.cogconsortium.uk/wp-content/uploads/2020/12/Repo... https://www.bmj.com/content/371/bmj.m4857 https://www.bmj.com/content/371/bmj.m4857