Health officials have declared an outbreak of West Nile virus (WNV) in the Las Vegas/Clark County area after receiving reports of 28 cases of the disease in humans. This is the highest case count in a season since the virus was first detected in the state in 2004.

Health officials have declared an outbreak of West Nile virus (WNV) in the Las Vegas/Clark County area after receiving reports of 28 cases of the disease in humans. This is the highest case count in a season since the virus was first detected in the state in 2004.