Generally we are more concerned when people die at 40 than at 80. The latter is considered "normal". There are a few ways that the epidemiologists try to quanti

Generally we are more concerned when people die at 40 than at 80. The latter is considered "normal". There are a few ways that the epidemiologists try to quantify this notion — DALYs or QALYs. Fentanyl takes people young. And it's new. Those characteristics make it a serious concern.