A mosquito pool sampled June 23 in Highland Park has tested positive for West Nile virus, the first confirmed indicator of the disease’s presence in Lake County this year. In 2015, five human cases of West Nile virus were reported in Lake County. You can report areas of stagnant water which are conducive to mosquito breeding by calling the Lake County Health Department’s West Nile virus hotline at 847-377-8300.