Jefferson County school officials say they’re working on a plan to resume classes, but with increased security. READ MOREREAD MOREREAD MOREWest Nile Surges in ColoradoThe number of West Nile virus cases in the United States is higher than usual this year, and the highest rates are in Colorado. The Centers for Disease Control is reporting that Colorado’s West Nile virus cases are more than double what other states are seeing. The CDC says Colorado has had 150 West Nile cases this year. Doctors told 9News that the spread of West Nile virus is preventable.