Native Americans in the United States reached the West Coast in the 1770s, smallpox rapidly killed at least 30% of Northwest Coast Native Americans. For the next eighty to one hundred years, smallpox and other diseases devastated native populations in the region. Puget Sound area populations, once estimated as high as 37,000 people, were reduced to only 9,000 survivors by the time settlers arrived en masse in the mid-19th century. Smallpox epidemics in 1780–82 and 1837–38 brought devastation and drastic depopulation among the Plains Indians. By 1832, the federal government established a smallpox vaccination program for Native Americans ("The Indian Vaccination Act of 1832"). It was
Chinese Americans American towards premarital genetic screening more supportive, especially when facing a chance of genetic defects. Moreover, from the perspective of this group of people, knowing whether a marriage partner has family history of mental illness with genetic basis is fairly important. Chinese Americans Chinese Americans, which includes American-born Chinese, are Americans who have full or partial Chinese ancestry. Chinese Americans constitute one group of overseas Chinese and also a subgroup of East Asian Americans, which is a further subgroup of Asian Americans. Many Chinese Americans are immigrants along with their descendants from mainland China, Hong Kong, Macau, Taiwan, as well