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RVF causes severe disease in animals, mainly cattle, sheep, goats and camels, with sheep being more susceptible.  ''Bos Taurus'' cattle and other European breed imported into Africa appear highly susceptible to RVF.  

RVF causes severe disease in animals, mainly cattle, sheep, goats and camels, with sheep being more susceptible.  ''Bos Taurus'' cattle and other European breed imported into Africa appear highly susceptible to RVF.  

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Age is an important factor in determining the severity of the disease, young stock are more susceptible – 90% of infected lambs die whereas in adult sheep mortality can be as low as <10% <ref name="who"/>. Small ruminants are also more susceptible. Pigs are resistant to low doses of RVF but high doses can cause viraemia <ref name="vaccine"/> .  

Age is an important factor in determining the severity of the disease, young stock are more susceptible – 90% of infected lambs die whereas in adult sheep mortality can be as low as <10% <ref name="who"/>. Small ruminants are also more susceptible. Pigs are resistant to low doses of RVF but high doses can cause viraemia <ref name="vaccine"/> .  

During an outbreak in Egypt RVF virus was also isolated from horses as well as camels <ref name="imam"/>.

During an outbreak in Egypt RVF virus was also isolated from horses as well as camels <ref name="imam"/>.