Like most diseases that deliver the most damage and rack up the death counts, Cholera begins with a lack of basic sanitation in developing countries (originating in India): the lack of hand-washing and boiling of water, the crammed living conditions of individuals; particularly family members, and uncooked food. Trading and immigration helped spread the disease as well. Developed countries had a much easier time with battling cholera. Water had irrigation systems and was cleaned properly. There were sewage systems that kept excrement at a reasonably safe distance from homes and food. John Snow also connected the relationship of cholera and water contamination at the water pumps, which proved to be the main cause of the spread of the disease, however, Pacini originally discovered the disease and supported the germ theory. Today, the war in Yemen has destroyed infrastructure and increased the poverty in the country, which has improved the living conditions of Cholera and is still ongoing today. Haiti is also devastated by Cholera. The flooding has intensified the outbreak; increasing the amount of unclean water consumption.