
Vaccination requirements for schoolchildren in the United States are determined by state and local jurisdictions, not federal law. Each state has its own set of vaccine requirements for children entering school, and nearly all states allow parents to opt their children out of vaccinations for non-medical reasons. State laws vary, with some states mandating specific vaccinations statewide, while others delegate the decision to the state health department or local authorities. School vaccination requirements are designed to promote immunization and reduce the risk of vaccine-preventable diseases. However, childhood vaccination rates have been declining, and outbreaks of previously eradicated diseases, such as measles, are becoming more common and severe.
| Characteristics | Values |
|---|---|
| Vaccination requirements | Set by state and local jurisdictions |
| Vaccination data | Reported by states to the CDC |
| Vaccination coverage | Varies across states |
| Vaccination exemptions | Allowed by state laws, including for non-medical reasons |
| Vaccination mandates | May be issued by states, state health departments, city councils, or school districts |
| Vaccination recommendations | Made by the ACIP and CDC, followed by medical professionals and state governments |
| Vaccination enforcement | Conducted by schools and health departments, in accordance with state and federal law |
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What You'll Learn
- Vaccination requirements are set by state and local jurisdictions
- State laws dictate which vaccines are required for students
- State laws determine the reasons for opting out of vaccines
- State vaccination approaches include reducing exemption types
- Federal law allows schools to share vaccination data with health departments

Vaccination requirements are set by state and local jurisdictions
State laws dictate which vaccines are required for local students and the reasons for which parents may opt their children out of receiving those vaccines. While every state allows students to opt out for medical reasons, some states also allow religious and philosophical exemptions. For example, Texas allows parents to obtain exemptions for religious or personal reasons or if a doctor determines that receiving the vaccine would not be safe for the child due to a medical condition. In contrast, California only allows medical exemptions.
States have applied various approaches to increase vaccination rates or decrease exemptions. These approaches include reducing the types of exemptions available, requiring that exemption forms be notarized, and assuring consistency of school practices with state laws. Approaches known to increase vaccination coverage include enforcement of school vaccination requirements, school-based vaccination clinics, reminder and recall systems, strong provider recommendations, and follow-up of under-vaccinated students.
Additionally, vaccination requirements can be mandated by different governing authorities within a state. Some states may pass legislation to mandate vaccinations statewide, while others may allow the state health department or local jurisdictions like city councils or school districts to effect their own mandates. The frequency of mandate reviews can also vary depending on how often the state legislature meets and how long it takes for legislation to be passed.
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State laws dictate which vaccines are required for students
State laws, not federal laws or individual district policies, dictate which vaccines are required for students. All 50 states have vaccination requirements for children entering school, and nearly all allow parents to opt their children out of those vaccines for non-medical reasons. The specific language used varies from state to state, but generally, states allow children to be opted out of vaccine requirements for religious reasons. For example, in the 2023-24 school year, 3.3% of kindergartners across the US had an exemption for at least one required vaccine.
States with the lowest measles vaccination rates include Idaho (79.6%) and Wisconsin (84.8%), while West Virginia has the highest rate at 98.3%, followed by New York and Connecticut (97.7%). However, within states, there can be significant differences in vaccination rates. For instance, in Texas, there was a measles outbreak that affected 259 people, mostly school-aged children, as of March 14, despite the statewide kindergarten MMR vaccination rate being 94%.
States have implemented various approaches to increase vaccination rates or decrease exemptions. These include reducing the types of exemptions available, requiring that exemption forms be notarized, and aligning school practices with state laws. Approaches known to increase vaccination coverage include enforcing school vaccination requirements, establishing school-based vaccination clinics, implementing reminder and recall systems, and following up on under-vaccinated students. Schools can also work with parents to avoid exemptions due to difficulties in meeting vaccination requirements deadlines.
The CDC's Public Health Law Program (PHLP) has compiled state statutes and regulations regarding school vaccinations. The CDC uses data reported by states to produce state- and national-level estimates of vaccination coverage among children in kindergarten.
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State laws determine the reasons for opting out of vaccines
State laws, not federal laws or district policies, determine the reasons for opting out of vaccines. All 50 states have vaccine requirements for children entering schools, and nearly all allow parents to opt their children out of those vaccines for non-medical reasons. The exact language varies from state to state, but generally, states allow children to be opted out of vaccine requirements for religious reasons. Every state allows students to opt out for medical reasons, and a small number of states do not offer non-medical exemptions. The four states that only allow medical exemptions are California, Connecticut, New Mexico, and Maine.
States have applied various approaches to increase vaccination rates or decrease exemptions. These include reducing the types of exemptions available, requiring that exemption forms be notarized, and assuring consistency of school practices with state laws. Approaches known to increase vaccination coverage include enforcement of school vaccination requirements, school-based vaccination clinics, reminder and recall systems, strong provider recommendations, and follow-up of under-vaccinated students. Schools can also work with parents to avoid exemptions due to difficulty meeting vaccination requirements deadlines.
Parents can ask for a medical exemption if a vaccine would be unsafe for their child. Reasons for medical exemption include having a disease or taking medicine that weakens the immune system, having a severe allergy to a vaccine or its ingredients, or having had a serious reaction to a vaccine in the past. To obtain a medical exemption, parents need to have their child's doctor sign a form. Almost half of the states require doctors to sign a new form annually or semi-annually.
Some states ask for evidence that the family belongs to a religious group that objects to vaccines. Only a few religions object to vaccines, including Christian Scientists and some faith-healing groups. However, in most states with this provision, parents can simply sign a form stating that they have religious reasons for opting out. Personal exemptions are harder to obtain in some states than in others. In certain states, parents may need to talk to their doctor or read about the benefits of vaccines and the risks of not vaccinating their children. They may also need to obtain a signature from a local health department official, write a letter explaining their reasons for refusing vaccines, or renew their exemption form annually.
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State vaccination approaches include reducing exemption types
In the United States, vaccination requirements are set by state and local jurisdictions. While all states provide medical exemptions, some also offer religious and/or philosophical exemptions. State laws establish mechanisms for enforcing school vaccination requirements and exemptions.
States have implemented various approaches to increase vaccination rates or decrease exemptions. One common strategy is to reduce the types of exemptions available, for example, by only allowing medical exemptions. For instance, California, Connecticut, New Mexico, and Maine only permit medical exemptions. In contrast, West Virginia allows parents to opt their children out of immunizations based on philosophical or religious reasons.
States can also increase the rigor of the exemption application process by requiring notarized exemption forms, mandating yearly exemption renewal submissions, or requesting parental documentation of exemption requests. These strategies aim to make it more challenging to obtain exemptions and, consequently, increase vaccination coverage.
Additionally, states can address vaccination hesitancy by educating parents about the importance of vaccines and the risks associated with non-vaccination. Some states, like Vermont and Oregon, include parental education as part of the exemption application process. Furthermore, primary care providers can play a crucial role in delivering trustworthy information about vaccines and having in-depth conversations with hesitant parents.
By combining stricter exemption policies with educational initiatives and stronger healthcare practices, states aim to reduce exemption rates and improve vaccination coverage to protect communities from vaccine-preventable diseases.
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Federal law allows schools to share vaccination data with health departments
In the United States, individual states have the authority to establish laws regarding health and education, including school vaccination requirements. While all 50 states have vaccination requirements for children entering school, parents may opt their children out of these vaccines for non-medical reasons in nearly all states. The exact language and regulations vary from state to state, but generally, states permit children to be exempted from vaccine requirements for religious reasons.
Federal laws, such as the Family Educational Rights and Privacy Act (FERPA) and the Health Insurance Portability and Accountability Act (HIPAA) Privacy Rule, also play a role in governing the privacy and sharing of immunization records. FERPA offers privacy protection for children's education records, while HIPAA governs the privacy of health records. The overlap between these two laws can sometimes lead to confusion among school officials and medical providers regarding the sharing of immunization information.
HIPAA vaccine records law addresses when covered entities may share vaccination records with public schools. Under the HIPAA Privacy Rule, providers may share patient information with public health authorities, such as health departments, to verify compliance with vaccination program requirements and promote timely vaccination. This sharing of information is crucial for monitoring annual vaccination and exemption rates and can help inform public health policies and interventions.
Some states have introduced and passed laws that mandate school-level reporting of aggregated vaccination rates to state health and education departments. For example, Colorado, Illinois, Oregon, and Vermont have legislated transparency in school vaccination data, which includes making this information available to the public. These laws enable health departments to collect and analyze vaccination data to identify areas with low vaccination coverage, assess the risk of disease outbreaks, and develop strategies to improve vaccination rates.
In summary, while school vaccination requirements are primarily dictated by state laws, federal laws also come into play regarding the privacy and sharing of immunization records. The interplay between FERPA and HIPAA can create complexities, but HIPAA does provide a framework for sharing vaccination data with health departments to support public health initiatives and ensure the timely vaccination of children.
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Frequently asked questions
No, the federal government does not mandate vaccinations. State laws dictate which vaccines are required for students and the reasons for which parents may opt their children out of receiving them.
No, vaccination requirements vary from state to state. While all 50 states have vaccine requirements for children entering school, the specific vaccines mandated differ.
Yes, states can change their vaccination requirements. For example, in 2025, West Virginia allowed parents to opt their children out of immunization requirements based on philosophical or religious reasons.
Yes, the CDC and ACIP provide recommendations for vaccinations. For example, the CDC recommends the annual flu vaccination, and the ACIP has a schedule of 17 recommended vaccines from birth through the age of 18.
You can find out about your state's specific vaccination requirements by checking your state's health department website or by contacting your local health department.











































