State of Illinois:
Illinois Department of Public Health | H1N1 Questions & Answers
Cook County:
Department of Public Health | Flu Information
City of Chicago:
Department of Public Health
Will County:
Health Department & Community Health Center
Kane County:
Health Department
DuPage County:
Health Department
Lake County:
Health Department / Community Health Center
McHenry County:
Department of Public Health
Kendall County:
Health Department
Grundy County:
Health Department Services
Kankakee County:
Health Department