But patients with more severe forms can go blind. Some develop encephalitis, a brain disease that can lead to headaches, coma or seizures. And some patients bleed to death.

但是，一些病人病叫严重，甚至可能会失明。一些人还会患脑炎，导致头痛，昏迷和抽搐。一些人甚至会流血过多造成死亡。

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The officer with a fractured skull suffered a bleed to the brain, but remains in a stable condition.

BBC: Police officers hurt in Harpurhey hit-and-run

Thames Valley Police said the post-mortem examination found the cause of death to be a bleed on the brain.

BBC: Alvescot Road, Carterton

Sean died four weeks later from a significant bleed in his brain.

BBC: Bristol Children's Hospital heart operations reduced