<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 been bitten by an infected mosquito, which then bit his wife, who then infected her child, who then infected his wife, who then infected his mother, and so on. The virus spread to the rest of the family, and then to other people who lived in the area.