Dirlikov, Emilio, Suizan Zhou, Lifeng Han, Zhijun Li, Ling Hao, Alexander Millman, and Barbara Marston. “Use of Public Data to Describe COVID-19 Contact Tracing in Hubei Province and Non-Hubei Provinces in China Between 20 January and 29 February 2020”. Western Pacific Surveillance and Response 12, no. 3 (August 12, 2021): 6. Accessed April 25, 2024. https://ojs.wpro.who.int/ojs/index.php/wpsar/article/view/808.