Before purified milk was adopted in the US, public health officials were concerned with cow milk transmission of bovine tuberculosis to humans with an estimated 10% of all tuberculosis cases in humans being attributed to milk consumption. Along with specific diseases, officials continue to be concerned about outbreaks. With the use of modern pasteurization and sanitation practices milk accounts for less than 1% of reported outbreaks from food and water consumption. As comparison, raw milk was associated with 25% of all disease outbreaks from food/water during the time before World War II in the U.S. From a public health stand point pasteurization has decreased the percentage of milk associated food/water borne outbreaks.