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.
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