Using WeChat, a Chinese Social Media App, for Early Detection of the COVID-19 Outbreak in December 2019: Retrospective Study

• Egile Nagusiak: Wang, Wenjun (Egilea), Wang, Yikai (Egilea), Zhang, Xin (Egilea), Jia, Xiaoli (Egilea), Li, Yaping (Egilea), Dang, Shuangsuo (Egilea)
• Formatua: Liburua
• Argitaratua: JMIR Publications, 2020-10-01T00:00:00Z.
• Gaiak: article
• Sarrera elektronikoa: Connect to this object online.

BackgroundA novel coronavirus, SARS-CoV-2, was identified in December 2019, when the first cases were reported in Wuhan, China. The once-localized outbreak has since been declared a pandemic. As of April 24, 2020, there have been 2.7 million confirmed cases and nearly 200,000 deaths. Early warning s...