Article

[Mexican flu: public reaction to news coverage measured using an internet panel]

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Abstract

Objective: To determine the reaction of the general public on the information regarding the Mexican flu. Design: Online panel interview. Method: From April 30 to May 4 2009, 572 people filled out an online questionnaire. Results and conclusion: 88% of the respondents had sufficient general knowledge about the Mexican flu. This information was mostly acquired by watching television (69%). More information was desired regarding the symptoms of the flu and those personal measures that could be taken to avoid infection.

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... We only counted the newspaper articles and television broadcasts about influenza A(H1N1)pdm09 which had been collected in context of another study [20]. Beyond articles and broadcasts, people could have obtained information about the pandemic from other sources, such as social media [37,38]. As an emerging source of information, social media was hypothesized to have limited impact on our study during the pandemic period, but it should be monitored in future studies. ...
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During the 2009 influenza pandemic period, routine surveillance of influenza-like-illness (ILI) was conducted in the Netherlands by a network of sentinel general practitioners (GPs). In addition during the pandemic period, four other ILI/influenza surveillance systems existed. For pandemic preparedness, we evaluated the performance of the sentinel system and the others to assess which of the four could be useful additions in the future. We also assessed whether performance of the five systems was influenced by media reports during the pandemic period. The trends in ILI consultation rates reported by sentinel GPs from 20 April 2009 through 3 January 2010 were compared with trends in data from the other systems: ILI cases self-reported through the web-based Great Influenza Survey (GIS); influenza-related web searches through Google Flu Trends (GFT); patients admitted to hospital with laboratory-confirmed pandemic influenza, and detections of influenza virus by laboratories. In addition, correlations were determined between ILI consultation rates of the sentinel GPs and data from the four other systems. We also compared the trends of the five surveillance systems with trends in pandemic-related newspaper and television coverage and determined correlation coefficients with and without time lags. The four other systems showed similar trends and had strong correlations with the ILI consultation rates reported by sentinel GPs. The number of influenza virus detections was the only system to register a summer peak. Increases in the number of newspaper articles and television broadcasts did not precede increases in activity among the five surveillance systems. The sentinel general practice network should remain the basis of influenza surveillance, as it integrates epidemiological and virological information and was able to maintain stability and continuity under pandemic pressure. Hospital and virological data are important during a pandemic, tracking the severity, molecular and phenotypic characterization of the viruses and confirming whether ILI incidence is truly related to influenza virus infections. GIS showed that web-based, self-reported ILI can be a useful addition, especially if virological self-sampling is added and an epidemic threshold could be determined. GFT showed negligible added value.
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