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Using Twitter to estimate H1N1 influenza activity
Content Type: Abstract
Twitter is a free social networking and micro-blogging service that enables its millions of users to send and read each other’s ‘tweets’, or short messages limited to 140 characters. The service has more than 190 million registered users and… read more… by the numbers. O’Reilly Radar, http://radar. oreilly.com/2010/04/twitter-by-the-numbers.html, 14 April 2010 … of Influenza Surveillance in the United States, http://www.cdc.gov/flu/weekly/ fluactivity.htm (accessed 15 August … et al.; licensee Emerging Health Threats Journal. www.eht-journal.org 83 …