Social media, local news, and mobile phone data are helping researchers develop tools to track and predict the path of the ongoing Ebola outbreak.

Nine days before the World Health Organization (WHO) declared the Ebola epidemic, a “mystery hemorrhagic fever” was spotted by HealthMap, software that mines government websites, social networks, and local news reports, among other sources, to map potential disease outbreaks. Run by researchers based at Boston Children’s Hospital, HealthMap uses “online informal sources for disease outbreak monitoring and real-time surveillance of emerging public health threats,” according to its website.