‘As many as 160 prisoners were injected with live cancer cells…’ http://www.dispatch.com/live/content/local_news/stories/2011/03/06/osu-had-role-in-old-drug-trials.html?sid=101

Perhaps the most famous was the cancer-vaccine test. As many as 160 prisoners were injected with live cancer cells.The study, co-sponsored by Ohio State and the Sloan-Kettering Research Institute, ran from 1956 until 1961. Eventually, researchers said they lost track of most of the prisoners and thus had no results.