The query time series from January 2004 through February 2009 for France were downloaded from Google Insights for Search, 1 of the 2 websites with Google Trends that enables downloading search trends from the Google database ( 5). Each participant listed queries likely to be used for searching information about these diseases on the Web. Queries were constructed through team brainstorming. We compared search trends based on a list of Google queries related to 3 infectious diseases (influenza-like illness, gastroenteritis, and chickenpox) with clinical surveillance data from the French Sentinel Network ( 4). To date, no studies have been published about the relationship of search engine query data with other diseases or in languages other than English. However, they did not develop the same approach for other diseases. On the basis of trends of Google queries, these authors put their results into practice by creating a Web page dedicated to influenza surveillance. scanned the Google database and found that the sum of the results of 45 queries that most correlated with influenza incidences provided the best predictor of influenza trends ( 3). ![]() Two reports showed that queries to the Internet search engines Yahoo and Google could be informative for influenza surveillance ( 2, 3). To the Editor: The idea that populations provide data on their influenza status through information-seeking behavior on the Web has been explored in the United States in recent years ( 1, 2).
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