Overview of U.S. Domestic Response to Coronavirus Disease 2019 (COVID-19) [Updated March 2, 2020] [open pdf - 1MB]
From the Background: "This report discusses selected actions taken by the U.S. federal government to quell the introduction and spread of COVID-19 [coronavirus disease 2019] in the United States. The President, the HHS [Health and Human Services] Secretary, and other federal officials have taken several specific actions to address this threat. While some of these actions are based in generally applicable authorities, others may be contingent upon the Secretary or another federal official making a determination or declaration, specific to that action, regarding the existence of a public health emergency or threat. Key actions and their legal basis are discussed in this report."
CRS Report for Congress, R46219
Congressional Research Service: https://crsreports.congress.gov/