Fig 1. Participation in the US Expanded Access Program (EAP) for convalescent plasma.

Choropleth map displaying the number of cumulatively enrolled patients in the EAP within each state of the US and participating territories, with lower enrollment values displayed in a lighter shade of blue and higher enrollment values displayed in a darker shade of blue. Registered acute care facilities are represented as filled yellow circles, with circle size corresponding to the number of registered facilities within the county. Blood collection centers are represented as filled red diamonds. All sites with registered patients were included. The choropleth map does not display Guam or the Northern Mariana Islands. The base layer of the geographical map was created using geographical data retrieved from the US Census Bureau (https://www2.census.gov/geo/tiger/TIGER2019/STATE/). No copyrighted material was used.