About the Virus, the Disease, and Its Spread West Nile virus is spread by the bite of an infected mosquito, and can infect people, horses, many types of birds, and some other animals. Most people who become infected with West Nile virus will have either no symptoms or only mild ones. However, on rare occasions, West Nile virus infection can result in severe and sometimes fatal illnesses. There is no evidence to suggest that West …showed first 75 words of 3091 total…

…showed last 75 words of 3091 total…prolonged neurological symptoms and muscle weakness. #Deaths Caused by West Nile Virus (WNV) Based on information from the US Centers for Disease Control and Prevention, between three per cent and 15 per cent of people with serious health effects due to WNV die, and the proportion is highest amongst the elderly. However, it is important to note that less than one per cent of those infected with WNV are reported to have developed severe health effects.