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
British railway milk trains train would then proceed to Waterloo, where it would reverse and return to Clapham Junction to pick up the other half of the train. The procedure was then repeated, so that the entire first milk train was unloaded between the end of evening peak traffic and the start of the following morning. The second train from Torrington would also split at Clapham Junction, but only half of its milk tanks would be propelled to Vauxhall, while the other half were dispatched to the Express Dairies depot at Morden. In the late morning, both trains' now empty milk tanks would be