From the Document: "This Insight provides a brief overview of presidential declarations under the Robert T. Stafford Disaster Relief and Emergency Assistance Act (hereinafter the Stafford Act--42 U.S.C. §5121 et seq.) in response to public health incidents. It also provides examples of previously issued Stafford Act declarations that address public health hazards, including the unprecedented declarations for the coronavirus disease 2019 (COVID-19) pandemic."
CRS Insight, IN11229
Congressional Research Service: https://crsreports.congress.gov/