Although active in the Congo region of Africa since 1985, the First and Second Congo War brought increased violence and instability to the area. MSF has had to evacuate its teams from areas such as around Bunia, in the Ituri district due to extreme violence, but continues to work in other areas to provide food to tens of thousands of displaced civilians, as well as treat survivors of mass rapes and widespread fighting. The treatment and possible vaccination against diseases such as cholera, measles, polio, Marburg fever, sleeping sickness, &lt;a href="HIV/AIDS"&gt;HIV/AIDS&lt;/a&gt;, and Bubonic plague is also important to prevent or slow down epidemics.