201492313235250734_20Ebola has come to American soil. The Centers for Disease Control and Prevention are doing everything in their power to stop the spread of the virus. But just how do they attempt to prevent an Ebola outbreak? The video above provides a step-by-step explanation. CDC detectives have used a method known as contact tracing in West Africa. In the fight against the virus, the government agency calls it “the key to stopping the outbreak and saving lives.” Contact tracing means finding everyone who comes in direct contact with a sick Ebola patient. They ask the infected patient and family members to list everyone that patient has interacted with. Monitors then quarantine those contacts over the next 21 days to check for symptoms of Ebola. “If a contact begins to show symptoms of Ebola, he is immediately isolated, tested, and provided care,” the video explains. It’s a process that takes weeks, and the process needs to be repeated until no new patients appear with symptoms. More