You could immediately see the difference between the street addicts stumbling into the clinic for help for the first time, and the patients who had been on legal prescriptions for a while. The street addicts would often stagger in with abscesses that looked like hard-boiled eggs rotting under their skin, and with open wounds on their hands and legs that looked, as Parry recalls, “like a pizza of infection. It’s mushy, and the cheese you get on it is pus. And it just gets bigger and bigger.”