How did dr. rush's treatment of yellow fever change as the epidemic progressed?

Why was russia drawn into a conflict with germany after ausria-hungary declared war on serbia ?

1.who controls fascism government? 2.who controls communism gov? 3. how do they stay in power

Why were chinese american immigrants frequently detained when trying to immigrate through angel island? the rules for immigration were stricter at this checkpoint due to health issues that were prevalent among asian populations at this time. the location of the island was difficult to reach, and ships to the mainland were often prevented from sailing more than once a week. immigration agents were notorious for asking immigrants confusing questions as a means of denying them entry. low wages caused a shortage of immigration officials, so many immigrants had to wait weeks or months before their applications were processed.