Fig. 2

The history of the US-specific lineage B.1.43. A US map showing the states where the lineage B.1.43 has been found. Numbers are reported cases of B.1.43. CA: California; WA: Washington. B-C Map of California (B) and Washington State (C). Counties and the number of B.1.43 cases were labeled. D The B.1.43 strains found in Washington state (orange) are derived from the ancestral B.1.43 sequence by one mutation (T2244C). Some of the B.1.43 strains LA County (dark green) carried the ancestral haplotype. X-axis is the number of mutations compared to viruses in Wuhan, China. The nodes are colored based on the US counties from which they were collected. E The distribution of LA County genomes over time. F The frequency of B.1.43 in LA County summarized per month. The number of B.1.43 strains identified each month is written near the data point