CRS Insight – COVID-19 Vaccine Doses: Selected Data Sources on Allocation, Distribution, and Administration – February 8, 2021: “The selected sources below can help congressional staff track the progress of the U.S. COVID-19 vaccination campaign at the national, state, and local levels. Sources were selected for having commonly cited and frequently requested data. This is not intended to be a comprehensive source list. Additional sources may be added in future updates. Because different resources use different methodologies, readers should check websites’ notes, definitions, and caveats. Readers should also use caution when comparing data across sources or geographies. For assistance in interpreting or analyzing these data, congressional staff should contact CRS (202-707-5700, or place a request at the CRS website). The Centers for Disease Control and Prevention’s (CDC’s) COVID-19 Vaccine website can assist constituents with vaccine questions, including “How Do I Get a Vaccine?” For an overview of vaccine data systems and considerations for Congress, see CRS Insight IN11584, Tracking COVID-19 Vaccines: U.S. Data Systems and Related Issues…”