The Associated Press reports human cases of West Nile Virus are on the decline in the state of Wyoming. In 2007, there were 185 cases and 2 deaths related to the virus, which tapered off to 10 cases in 2008, 12 cases and 1 death in 2009, 6 cases in 2010, and three infections last year. Toby Granger, a registered nurse at Sheridan's Public Health Clinic, said there have been no confirmed cases of West Nile Virus here. However, because the virus can mimic many other illnesses, such as the flu, some cases may have been overlooked.
Though confirmed cases are down, Granger said it's still important to avoid mosquito bites, because that's how the virus is given to humans, and there's no way to be sure it's going away for good.
Currently, there is no human vaccination against West Nile Virus.