POISON CONTROL
        AAP
        HEALTHYCHILDREN.ORG
American Academy of Pediatrics   
www.aap.org
Children’s Hospital Boston
www.childrenshospital.org
Vaccine Education Center   
www.vaccine.chop.edu
National Institutes of Health   
www.nih.gov
Centers for Disease Control   
www.cdc.gov
Children’s Hospital of Philadelphia
www.chop.edu