Timely outbreak information was paramount to public health bodies issuing travel advisories during the 2013-2016 West Africa Ebola virus outbreak. This article explores the potential for a syndromic system/Shewhart control chart based on the online interaction with a national travel health Web site in comparison with searches on the Google UK search engine. The study showed an amplification of perceived risk among users of a national travel health Web site months before the World Health Organization declared the outbreak a Public Health Emergency of International Concern and the initial surge in public interest on Google UK in August 2014.
Keywords: Infections; epidemiology; health services; prevention; surveillance.
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