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Public Health Foundation(PHF) Immunization Center http://www.phf.org/programs/immunization/Pages/PHF_Immunization_Center.aspx
 
CDC Vaccines and Immunizations   https://www.cdc.gov/vaccines/index.html
 
Immunization Action Coalition  http://www.immunize.org/handouts
 
Illinois Dept. of Public Health  http://www.dph.illinois.gov/
 
St. Clair County Health Dept. www.health.co.st-clair.il.us