Fung, Isaac Chun-Hai, Zion Tsz Ho Tse, and King-Wa Fu. “The Use of Social Media in Public Health Surveillance”. Western Pacific Surveillance and Response 6, no. 2 (June 26, 2015). Accessed November 22, 2024. https://ojs.wpro.who.int/ojs/index.php/wpsar/article/view/319.