From The Chicago Tribune: The Chicago school system is planning to start stocking epinephrine injectors at schools to treat life-threatening allergic reactions. A state law signed by the governor this summer allows districts to stock EpiPens and authorizes school officials to give an epinephrine shot to any student suffering a severe allergic reaction. The law came in response to the 2010 death of Chicago student Katelyn Carlson, who had an allergic reaction to peanuts during a school party. By the beginning of next school year, the Chicago district hopes to stock four to six pens per school, costing the district about $195,000. Officials estimate that 4,000 students in Chicago schools have diagnosed allergies.