1. COVID-19 United States Cases by County. Johns Hopkins Coronavirus Resour Cent. https://coronavirus.jhu.edu/us-map. Retrieved 3 August 2021.
2. Important updates on finals, commencements, flexible work arrangements and additional COVID-19 announcements | Office of the President. https://president.umich.edu/news-communications/letters-to-the-community/important-updates-on-finals-commencements-flexible-work-arrangements-and-additional-covid-19-announcements/. Retrieved 28 February 2022.
3. 2020. Message from campus leaders on the return to academics | UNC-Chapel Hill. Univ N C Chap Hill. https://www.unc.edu/posts/2020/03/22/message-return-to-academics/. Retrieved 28 February 2022.
4. Coming together in an extraordinary time | President’s Office | Washington State University | Washington State University. https://president.wsu.edu/2020/03/27/coming-together-in-an-extraordinary-time/. Retrieved 28 February 2022.
5. Mervosh S , Lu D , Swales V. 2020. See Which States and Cities Have Told Residents to Stay at Home. N Y Times.