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. 2014 Apr 29;4(4):e004869. doi: 10.1136/bmjopen-2014-004869

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Top panel: weekly estimated cases of influenza shown are from English general practitioner surveillance system (Health Protection Agency Q–Surveillance) and UK wide estimates adjusted for changes in care seeking behaviour (Flu survey). Middle panel: weekly sales per 100 000 customers of six product groups from a national UK retailer. Bottom panel: scaled weekly estimates of UK media interest (number of relevant newspaper headlines (LexisNexis) or newspaper, radio and television articles (Meltwater)); UK public interest is represented by relative internet search volume from Google Search Trends.