Talks The Worst Mass Poisoning in History May 5, 2009May 5, 2020 Crelis 0 Comments The worst mass poisoning in history from Crelis Rammelt Rammelt, C. F. (2009). Poster presentation: The Worst Mass Poisoning in History, Arsenic Contaminated Drinking Water in Rural Bangladesh. Sydney: UNSW Well-Being Research Showcase.