Un-and-under vaccinated people are a threat to children and adults who might not be able to receive certain vaccines because they have cancer or other health conditions. Children who are not up-to-date with vaccines recommended for their age may be excluded from child care and schools if an outbreak occurs.
Some reputable immunization websites to educate staff and parents include:
1. American Academy of Pediatrics - Healthy Children https://www.healthychildren.org
2. Centers for Disease Control and Prevention (CDC)

•  Easy-to-read immunization schedules (in English and Spanish) https://www.cdc.gov/vaccines/schedules/easy-to-read/child.html
•  Vaccine information for parents www.cdc.gov/vaccines/parents/resources
•  Infant Immunization - Frequently Asked Questions www.cdc.gov/vaccines/parents/parent-questions.html

3. Children’s Hospital of Philadelphia Vaccine Education Center http://www.chop.edu/centers-programs/vaccine-education-center
4. Vaccinate Your Family http://vaccinateyourfamily.org/
5. Flu Vaccine Materials for Early Education/Child Care Staff and Schools https://www.cdc.gov/flu/resource-center/freeresources/print/print-schools-childcare.htm                                                                                    9/2018