During a 10-month stretch last year, staff members at the health agency responded to 270 tweets about “food poisoning.” Based on those tweets, 193 complaints were filed and 133 restaurants in the city were inspected. Twenty-one were closed down and another 33 were forced to fix health violations. That’s according to a study in the journal Morbidity and Mortality Weekly Report.[Jenine K. Harris et al, Health Department Use of Social Media to Identify Foodborne Illness — Chicago, Illinois, 2013–2014]