West Nile virus illnesses nearly doubled to 50 in Illinois this week. Most of the cases are from the Chicago area. There were three new cases reported in Missouri, including a 52-year-old St. Charles man. The mosquito spraying schedule has been stepped up in St. Louis County in advance of expected rainfall. Nationally, 1,590 cases have been reported, and health officials expect the numbers to rise.

Missouri • 7 West Nile virus cases, 1 death

Illinois • 50 cases, 1 death

Sources: Missouri Department of Health and Senior Services; Illinois Department of Public Health.