<human>:  Why is it called ‘West Nile virus’?
<bot>: The virus was first identified in a man who lived in West Nile, Uganda. He had symptoms of encephalitis, a disease that causes inflammation of the brain. It was not until 1999 that the virus was identified as the cause of this disease. The name West Nile virus comes from the West Nile region in Uganda, where the first case was discovered.