Alice Catherine Evans in 1917 and published her work in the "Journal of Infectious Diseases" in 1918. She was met with skepticism, particularly because she was a woman and did not have a Ph.D. She warned that raw milk should be pasteurized to protect people from various diseases. During the 1920s, scientists around the world made the same findings, and eventually, "Brucella" was confirmed as the disease that caused what was then known as undulant fever and Malta fever. Her findings led to the pasteurization of milk in 1930. As a result, the incidence of brucellosis in the United States was significantly reduced.
The a2 Milk Company whether a cow produces the A2 or A1 type protein in its milk. The test allows the a2 Milk Company to license milk producers once proven their cows produce only A2 beta-casein protein in their milk, to the exclusion of the A1 beta-casein protein type. A2 Corporation licensed patents filed in the 1990s by the New Zealand Dairy Board, and filed its own patents on genetic tests to determine what form of beta-casein cows produce in milk, and concerning potential adverse health consequences of A1 milk. By 2012 A2 Corporation had developed a worldwide suite of intellectual property, including trademarks,