title: Hygienic conditions in ancient Rome and modern London.
mesh_terms: D049668:History, 15th Century; D049669:History, 16th Century; D049670:History, 17th Century; D049672:History, 19th Century; D049673:History, 20th Century; D049690:History, Ancient; D049691:History, Medieval; D008131:London; D011634:Public Health / Q000266:history*; D012384:Rome; D012722:Sewage; D014881:Water Supply
chemical_list: D012722:Sewage