Novel data stream sources	Main characteristics
Google Trends	Online tracking system of Internet hit-search volumes
Twitter	Social network website, which allows users to publish short messages, visible to others
Youtube	Video-hosting website that allows members to store and serve video content
Baidu	Main Chinese Internet search engine company
HealthMap	Automated electronic information system for monitoring, organizing, and visualizing reports of global disease outbreaks according to geography, time, and infectious disease agent
Facebook	Social network website, where people can create own profiles and share information
Instagram	Social network website used to take and share photos
Google News	News aggregator provided by Google
Pinterest	Online service that allows to share images through social network
Sina Weibo	Most popular social media sites in China
Sina Micro	Popular Chinese social media that promotes websites, services, and products to promote collaboration within an organization
Wikipedia	Large website that provides free information