Two crows in Winnebago County have tested positive for the West Nile Virus. The Winnebago County Health Department also found three mosquito pools that tested positive. So far this year, there have not been any human cases reported in the county. Last year, there were three human cases in Winnebago County. In 2012, county health officials confirmed 30 birds tested positive and 13 mosquito pools. The peak time for transmission of the disease is mid-July through the middle of October.