title: Rift Valley Fever, Yemen (update).
mesh_terms: D000818:Animals; D003906:Developing Countries; D004196:Disease Outbreaks; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D012295:Rift Valley Fever / Q000175:diagnosis / Q000453:epidemiology*; D012307:Risk Factors; D015996:Survival Rate; D014944:World Health Organization; D015006:Yemen / Q000453:epidemiology