“…We identified eight outbreaks in refugee camps that occurred between 1971 and 1991 across Africa and Asia (Table 1). Where reported, the proportion of the refugee population affected (attack rate) was 1.8% or greater (4 outbreaks), and the proportion of cases who died (case fatality ratio [CFR]) was as high as 30% (range 1%–30%, 8 outbreaks) [16–24].…”