PBS NewsHour examines use of Twitter to track disease spread

PBS NewsHour's blog "The Rundown" examines "a recent slate of independent studies" that assert "Twitter can accurately track the spread of a virus or disease - and do it much faster than traditional surveillance methods." "From Iowa to Brazil, researchers are discovering there is a distinct association between complaints, worries and random rants on the social media site and the spread of medical issues as wide-ranging as the flu, dengue fever and pollen-induced allergies," the blog states (Khan, 8/9).