Epidemic typhus risk in Rwandan refugee camps.
D006801:Humans; D011159:Population Surveillance; D012036:Refugees; D012307:Risk Factors; D012432:Rwanda / Q000453:epidemiology; D014438:Typhus, Epidemic Louse-Borne / Q000453:epidemiology* / Q000209:etiology / Q000517:prevention & control / Q000635:transmission