Fig 4 -

Map of estimated undiagnosed (A) and total (B) prevalence and transmission trends and overall seroprevalence (C) as of December 31, 2020, based on data through January 7, 2021. Values based on primary random effects model. Results for the simpler geometric mean model are provided in Fig F in S1 Text. The maps were generated using the R package usmap https://cran.r-project.org/web/packages/usmap/index.html (GPL-3), which uses shape files from the U.S. Census Bureau (the link provided in documentation is here: https://www.census.gov/geographies/mapping-files/time-series/geo/tiger-line-file.html).