Published: 16 February, 2021 | Volume 5 - Issue 1 | Pages: 022-031
A - Phylogenetic tree: showing the relationship of lineage B.1.1.7 (20B/501Y.V1, orange branch and tips) to other circulating- lineages. The long branch length for this lineage reflects the fact that it accumulated a significant number of mutations prior to being discovered. B, Frequencies of circulating lineages over the time. Lineages are colored as in the tree, with lineage B.1.1.7 (20B/501Y.V1) shown in orange (From JAMA).