section_path: History/Sub-Saharan Africa
section_name: Sub-Saharan Africa
paragraph_text: Sub-Saharan Africa
  
  In West Africa, various ethnic groups such as the Yoruba have used black soap to treat skin diseases.
  
  In Southern Africa, the Zulu people conducted methods of sanitation by using water stored in pottery at Ulundi. The Himba people of Namibia and Angola also utilized mixtures of smoke and otjitze treat skin diseases in regions where water is scarce.