RVF outbreaks usually only happen about once every 5 years.

裂谷热通常每5年才暴发一次。

RVF can cause severe bleeding, pressure on the brain, and very bad eye problems.

裂谷热可导致严重出血、大脑压力和非常严重的眼睛问题。

RVF is especially dangerous because it is difficult to predict.

裂谷热特别危险，因为它很难预测。

People suffering from RVF usually experience physical problems similar to influenza - like fever, weakness, and back pain.

裂谷热患者通常会有类似流感引起的身体问题，如发烧、虚弱和背部疼痛。

RVF also causes pregnant animals to immediately lose their unborn babies.

裂谷热还会导致怀孕的动物立即流产。

But scientists believe that they may have found a way to help people prepare for outbreaks of diseases like RVF.

但科学家认为，他们可能已经找到了一种方法，可以帮助人们为裂谷热等疾病的暴发做好准备。