Health and Fitness Most Pertussis Cases in Illinois Since 1950 by Gary Kopycinski on April 17, 2013 Gary Kopycinski Author More in Health and Fitness: On Hantavirus, Park Forest Officials Urge Caution May 18, 2026 Rep. Kelly Condemns FDA Approval of Flavored E-Cigarettes May 6, 2026 Park Forest Aligns With Illinois Guidance on Childhood Vaccines Amid Federal Changes January 11, 2026 National Infant Immunization Week – April 20-27, 2013