1882Congress passed the Chinese Exclusion Act, which barred Chinese immigrants from coming to the country for 10 years. Signed by President Chester A. Arthur, the law was one of the most significant restrictions on free immigration in history. It was repealed in 1943.1997Four health-care companies agreed to a $600 million settlement with hemophiliacs who contracted AIDS from HIV-infected blood transfusions between 1978 and 1985.