United States raw milk debate systematic review of the food safety of unpasteurized milk concluded that science-based data to substantiate claims of health benefits "are lacking or do not exist" and the risks associated with disease outbreaks as a result of raw milk consumption are "considerably higher". Pasteurization was first used in the United States in the 1890s after the discovery of germ theory to control the hazards of highly contagious bacterial diseases, including bovine tuberculosis and brucellosis, that could be easily transmitted to humans through the drinking of raw milk. Initially after the scientific discovery of bacteria, no product testing was available to determine
Demographic threat numbered only slightly fewer than Protestants. There is debate over whether and to what extent this trend will continue and its possible impact on the political situation. Russia fears the "demographic threat" posed by the potential for "large-scale Chinese immigration" to its thinly populated far east. Illegal immigration of Chinese nationals is a special concern. Some in the United States have expressed concern about the "demographic threat" posed by millions of migrants from Mexico and Latin America and their descendants. Migration Stock is the number of people that live in an area that they were not originally from and Migration