All of our data was supplemented by Dr. Laura Kahn, whose expertise was invaluable in helping us to develop this tool.

Johns Hopkins Coronavirus Resource Center: https://coronavirus.jhu.edu/. Retrieved May 26, 2021.

Kahn, Laura H. Who's in Charge?: Leadership during Epidemics, Bioterror Attacks, and Other Public Health Crises. Praeger Security International, 2020.

Fielding, Burtram C. “A brief history of the coronavirus family — including one pandemic we might have missed.” The Conversation, March 24, 2020. Retrieved May 26, 2021.

(2013). Journal of Virology.

Hasell, J., Mathieu, E., Beltekian, D. et al. “A cross-country database of COVID-19 testing.” Sci Data 7, 345 (2020). https://doi.org/10.1038/s41597-020-00688-8. Retrieved May 26, 2021.

"Symptoms of Coronavirus." Centers for Disease Control and Prevention. Retrieved May 26, 2021.

Vijgen, Leen et al. “Complete genomic sequence of human coronavirus OC43: molecular clock analysis suggests a relatively recent zoonotic coronavirus transmission event.” Journal of Virology vol. 79, 3 (2005): 1595-604. https://doi.org/10.1128/JVI.79.3.1595-1604.2005. Retrieved May 26, 2021.

Kretchmer, Harry. “Key milestones in the spread of the coronavirus pandemic.” World Economic Forum, April 22, 2020. Retrieved May 26, 2021

LePan, Nicholas. “A visual history of pandemics.” World Economic Forum, March 15, 2020. Retrieved May 26, 2021.

Allam, Zaheer. “The First 50 days of COVID-19: A Detailed Chronological Timeline and Extensive Review of Literature Documenting the Pandemic.” Surveying the COVID-19 Pandemic and its Implications (2020): 1–7. https://doi.org/10.1016/B978-0-12-824313-8.00001-2. Retrieved May 26, 2021.

Cha, Victor and Kim, Dana. “A Timeline of South Korea's Response to COVID-19.” Center for Strategic and International Studies, March 27, 2020. Retrieved May 26, 2021.

Hauck, Grace; Gelles, Karl; Bravo, Vanessa and Thorson, Mitchell. “Five months in: A timeline of how COVID-19 has unfolded in the US.” USA Today, April 21, 2020. Retrieved May 26, 2021.