Table 1

Data sources of influenza case estimates, media reporting and public interest

DataDescriptionSourceDatesReference
FlusurveyUK National Case EstimatesAdjusted healthcare-based surveillance system1 June 2009–8 February 201022
HPA/Q-Surveillance networkRegional Case EstimatesGeneral practitioner symptomatic surveillance4 May–15 November 200923
LexisNexisUK Media CoverageUK newspaper headlines with reference to A/H1N1pdm and related terms25 April–27 December 200924
MeltwaterUK Media CoverageUK newspaper headlines, radio and television news items with reference to A/H1N1pdm and related terms6 April 2009–19 April 201025
Google TrendsUK Internet SearchesInternet searches from UK IP addresses with reference to A/H1N1pdm and related terms6 April–28 December 200926

  • HPA, Health Protection Agency.