Frisco has reported additional mosquito pools testing positive for West Nile virus, with the total number of positive pools unclear. Some reports indicate this is among the first or third positive sample of the year, while others suggest it may be one of many, with totals as high as 24 or 22. The presence of West Nile virus has also been reported in other areas, including Denton County, where a human case has been reported, and San Antonio.