1. Washington State 2019-nCoV Case Investigation Team. First Case of 2019 Novel Coronavirus in the United States;ML Holshue;N Engl J Med,2020
2. Website: Maryland, The Office of Governor Larry Hogan. Accessed January 10, 2022. https://governor.maryland.gov/2020/03/05/governor-larry-hogan-declares-state-of-emergency-expands-statewide-response-to-novel-coronavirus/
3. Website. Trump White House Archives. Accessed January 10, 2022. https://trumpwhitehouse.archives.gov/presidential-actions/proclamation-declaring-national-emergency-concerning-novel-coronavirus-disease-covid-19-outbreak/
4. Website: Commonwealth of Pennsylvania Office of the Governor. Accessed January 10, 2022. https://www.governor.pa.gov/wp-content/uploads/2020/03/20200306-COVID19-Digital-Proclamation.pdf
5. Website: State of Maryland Executive Department. Accessed January 10, 2022. https://governor.maryland.gov/wp-content/uploads/2020/03/Gatherings-FOURTH-AMENDED-3.30.20.pdf