Figure 1.

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) B.1.617 variant emerging in India A, Maximum-likelihood phylogeny of lineages bearing L452R in spike. All sequences with the L452R mutation were downloaded from https://gisaid.org and manually aligned to reference strain MN908947.3 with mafft. Sequences were deduplicated and a random subset of 400 global sequences and 100 US sequences were then selected with seqtk. All sequence lineages were assigned using pangolin version 2.4. Major lineages are indicated as straight lines adjacent to the heatmap, alongside mutations of current interest. The phylogeny was inferred with IQTREE2 version 2.1.3. B, The number of B.1617 cases per month in India in the first half of 2021.