(Undated) -- A health alert is issued after two Nebraska mosquito pools test positive for West Nile Virus.
The Nebraska Department of Health and Human Services says there have been no confirmed human cases this season in the state so far, but that human WNV infections "generally follow in the wake of positive mosquito pools." The majority of cases typically begin in mid-July, peak around Labor Day, and disappear around mid-September.
DHHS says about 80% of WNV-infected persons are asymptomatic. Those who develop symptoms have an incubation period of 3–14 days. Symptoms include:
- skin rash on the trunk of the body
- swollen lymph glands
- eye pain
Those infected with WNV appear to develop permanent immunity and cannot be reinfected.