Rift Valley fever.
D000818:Animals; D004196:Disease Outbreaks / Q000517:prevention & control*; D004534:Egypt / Q000453:epidemiology; D006801:Humans; D011159:Population Surveillance; D012295:Rift Valley Fever / Q000453:epidemiology* / Q000517:prevention & control*; D014611:Vaccination / Q000379:methods*