Public School Vaccination Requirements by State

States use school vaccination requirements to protect public health and reduce vaccine-preventable diseases. Most state laws follow guidance from the Centers for Disease Control and Prevention (CDC) and its Advisory Committee on Immunization Practices (ACIP). This can all be rather confusing, especially at this time.

As you may know, the CDC revised its childhood and adolescent immunization schedule in January 2026. While this may deviate from your pediatrician’s recommendations, understanding your state’s school immunization rules can be critical.

In this article, we review key information that parents of school-age children should know about immunization requirements and exemptions. We’ll also provide you with a snapshot of each state’s K-12 school rules, with a direct link to your state’s mandates.

If you’re facing issues related to these requirements, consider speaking with an education law attorney in your state. They can help you sort through the red tape and protect your rights as parents.

In the meantime, let’s go over some general information.

What Vaccines Are Typically Required?

Although each state is different, they all require students to receive a series of vaccines before attending school. These typically include a core, or standard, series of vaccinations.

Your pediatrician or school nurse may refer to them as a “routine childhood series.” Regardless of the reference, this core series usually includes:

• DTaP/Tdap vaccine (protects against diphtheria, tetanus, and pertussis)
• MMR vaccine (protects against measles, mumps, and rubella)
• Polio vaccine (IPV)
• Varicella vaccine (protects against chickenpox)
• Hepatitis B vaccine

These vaccines appear in every state’s mandates. States vary in what they require beyond this core series.

Which Students Must Follow State Requirements?

For all 50 states (and DC), the state rules apply to K-12 students in public schools. They also apply to nearly all private school students, although Alaska has carved out one narrow exception we detail in the state-by-state breakdown.

The vaccination requirements of the other types of schools follow below:

Homeschooling

How states treat homeschooled students involves some of the largest disparities we see with vaccination policies. Some states require homeschooled students to meet immunization requirements only if they participate in public‑school activities, like sports and testing. Examples include Florida, Arizona, and Colorado.

In others, the state’s requirements apply to homeschoolers. North Carolina and Pennsylvania are examples of states using this policy. On the other end of the scale, immunization requirements don’t apply to homeschoolers in Illinois, Indiana, and Michigan. The state-by-state breakdown in this article shows exactly where your state stands regarding required immunizations.

Preschool and Daycare

The state mandates in this article apply only to K-12 students. Preschools, daycares, and childcare centers often have stricter immunization requirements.

Nearly all states require vaccines for licensed childcare centers. These often include:

• Hepatitis A vaccine
• Hib vaccine (Haemophilus influenzae type b)
• PCV vaccine (pneumococcal)

A few states, like Connecticut and New Jersey, require the flu vaccination for childcare/preschool. Exemption rules for these types of facilities may also differ from K-12 laws.

Colleges and Universities

State K–12 laws don’t govern college immunization requirements. They are usually set by:

• State health departments
• University systems
• Individual institutions

Most colleges require MMR, Tdap, and meningococcal vaccines (for meningitis prevention). Some also make Hepatitis B and COVID-19 vaccines mandatory.

Types of Exemptions

All states allow exemptions from these mandates for medical reasons. Many states also allow vaccine exemptions for non‑medical reasons. These could include religious beliefs or philosophical objections. Let’s take a look at some different types of exemptions:

Medical Exemptions

A medical exemption is available when a licensed health care provider determines a child cannot safely receive a vaccine. Reasons may include severe allergies or certain medical conditions.

To request a medical exemption, each state requires, at a minimum, signed documentation from a licensed health care provider. Some require little else. For others, state approval or strict alignment with ACIP guidance is also necessary.

Religious Exemptions

Some states allow exemptions based on sincerely held religious beliefs. For example, someone’s faith may prohibit certain medical interventions. Parents must typically submit a signed form or notarized statement.

Philosophical Exemptions

A smaller number of states allow exemptions based on personal or philosophical beliefs. This might include a parent’s conviction that the potential risks of vaccination outweigh the benefits for their child. These are sometimes grouped under non-medical exemptions.

General Exemption Process

While each state has its own rules, the exemption process usually includes:

• Completing a state‑approved exemption form
• Providing documentation
• Renewing the exemption each school year in some states

Many states require parents to acknowledge that exemptions can be suspended during an outbreak, but not all.

Vaccine Requirements by State

All states require schoolchildren to be vaccinated against communicable diseases. However, exemption policies vary significantly from state to state.

Five states allow medical exemptions only:

• California
• Connecticut
• Maine
• New York
• West Virginia

Sixteen states allow medical, religious, AND philosophical exemptions:

• Arizona
• Arkansas
• Colorado
• Idaho
• Louisiana
• Michigan
• Minnesota
• North Dakota
• Ohio
• Oklahoma
• Oregon
• Pennsylvania
• Texas
• Utah
• Washington
• Wisconsin

The remaining states allow medical and religious exemptions but do not permit philosophical or personal belief exemptions.

The table below provides a snapshot of each state’s exemption policies and vaccine requirements beyond the core series. For detailed information about your state’s specific procedures, review the comprehensive breakdowns that follow.

Quick Reference: State Exemption Policies

*DC allows a written opt-out specifically for HPV

Understanding Exemption Requirements

While all states allow medical exemptions, the procedures and documentation requirements can differ substantially. Some states have relatively straightforward processes, while others require state approval or strict adherence to federal guidelines.

Medical Exemption Procedures by State

All 50 states and DC allow medical exemptions. However, some states have significantly more restrictive processes than others.

The states with heightened medical exemption requirements are:

Arizona, Arkansas, Florida, Georgia, Ohio, Oklahoma, Tennessee, Utah, and Wyoming have relatively few procedural hurdles beyond standard provider documentation.

All other states require standard provider documentation (form, certification, or written statement) without additional state review or heightened restrictions.

Religious Exemption Procedures by State

45 states and DC allow religious exemptions. The five states that do NOT allow religious exemptions are: California, Connecticut, Maine, New York, and West Virginia.

The states requiring notarization or additional verification are:

A handful of states require education sessions or counseling for a religious exemption, in addition to the parent statement. Those states are:

• Michigan: Mandatory education session at the local health department
• Oregon: Mandatory parent counseling or education session
• Washington: Health care provider signature required

All other states that allow religious exemptions require a parent statement, form, or affidavit, without notarization or additional requirements. These include: 

• Alabama
• Alaska
• Arizona
• Delaware
• District of Columbia
• Florida
• Georgia
• Hawaii
• Idaho
• Illinois
• Indiana
• Iowa
• Kansas
• Kentucky
• Louisiana
• Maryland
• Massachusetts
• Mississippi
• Missouri
• Montana
• Nebraska
• Nevada
• New Hampshire
• New Jersey
• New Mexico
• North Carolina
• North Dakota
• Ohio
• Oklahoma
• Oregon
• Pennsylvania
• Rhode Island
• South Carolina
• South Dakota
• Tennessee
• Texas
• Utah
• Vermont
• Virginia
• Wisconsin
• Wyoming

Philosophical/Personal Belief Exemption Procedures

Only 16 states allow philosophical or personal belief exemptions:

The remaining 34 states and DC do not allow philosophical exemptions.

States with Unique Requirements or Situations

While most states follow similar frameworks for vaccination requirements, several have unique policies or circumstances worth noting. If you live in one of these states, pay special attention to how these distinctions might affect your child.

HPV Vaccine Requirements

Most states don’t require the HPV (human papillomavirus) vaccine for school attendance, even though it’s part of the CDC‘s recommended immunization schedule. However, two jurisdictions stand out:

The District of Columbia requires the HPV vaccine for students in grades 6-12. However, DC recognizes that this vaccine is particularly sensitive for some families. Unlike other required vaccines, DC allows parents to submit a written opt-out for HPV, even if they wouldn’t qualify for other exemption types.

Rhode Island requires the HPV vaccine for 7th-grade students. Unlike DC, Rhode Island doesn’t provide a special opt-out provision for HPV, as the standard exemption rules apply.

Hepatitis A Requirements

While Hepatitis B is part of the core vaccine series required in all states, Hepatitis A is typically only required for younger children in childcare settings. Kansas and Kentucky extend this requirement to K-12 students and require the Hepatitis A vaccine in addition to the standard core series for school-age children. If you’re moving to either of these states from elsewhere, your child may need to receive this vaccine to meet school entry requirements.

Religious Schools and Private School Exemptions

Alaska has carved out a unique exception for private schools. While vaccination requirements apply to both public and private school students, Alaska allows religious or church-run schools to claim a religious exemption for the entire school. This means these schools can operate without enforcing individual student immunization requirements. Students attending these exempt schools wouldn’t need to be vaccinated or obtain individual exemptions.

Homeschool Distinctions

Most states may or may not require homeschooled students to meet immunization requirements. A few states have more nuanced approaches.

Louisiana distinguishes between different types of home education. Families enrolled in “Home Study” programs (registered with the state) must provide immunization documentation or exemptions. However, families operating “home-based private schools” that operate more independently aren’t required to submit immunization documentation.

Tennessee takes a similar approach. Independent homeschools have no immunization documentation requirements. However, students enrolled in church-related umbrella schools must follow the immunization policies established by those umbrella organizations. These requirements can vary from one umbrella school to another.

State Health Department Resources

For the most current and detailed information about your state’s immunization requirements, consult your state health department directly. Each state maintains official guidance documents that include specific vaccine schedules, exemption forms, and compliance procedures.

Recent Legal Changes and Ongoing Litigation

Mandatory immunizations continue to be a hotly contested. Two states have recently experienced significant legal challenges to their vaccination laws, and others have pending litigation.

Mississippi had some of the strictest vaccination requirements in the nation, allowing only medical exemptions. However, in 2023, the state added religious exemptions pursuant to a federal court order. This represents a major policy shift resulting from litigation. Families seeking religious exemptions in Mississippi should consult current state guidance to understand the newly established procedures.

West Virginia had allowed only medical exemptions, but the Governor issued an executive order to allow religious exemptions. The West Virginia Supreme Court of Appeals issued a stay, temporarily blocking the order. As of this writing in February 2026, no final ruling has been issued. Families in West Virginia should monitor this ongoing litigation, as the outcome will determine whether religious exemptions become available. For now, only medical exemptions are accepted.

These legal developments highlight how vaccination requirements can change relatively quickly through court decisions or legislative action. If you live in a state with recent or ongoing legal challenges, check your state health department website regularly for updates.

Transferring Schools or Moving Between States

You might be concerned about vaccination requirements if your children are either switching schools or you’re moving to a home in a different state. School entry requirements generally follow children whenever they change schools, but the steps may differ, depending on the circumstances.

Moving Between States

When families relocate to a new state, children must meet that state’s school entry immunization rules. This may include different vaccine doses, timing, or exemption options. Schools typically need official records before enrollment or may allow only brief provisional attendance.

Transferring Schools

When transferring schools within the same state, children already meet the state’s standards. The process usually involves providing existing records to the new school and updating any missing documentation.

In both situations, schools verify compliance and ensure exemptions follow state‑approved procedures. If your child doesn’t meet the requirements, they may be denied enrollment until the matter is settled.

If Your Child Is Denied Enrollment

Learning that your child can’t start school due to vaccination requirements can be stressful. Whether you’re seeking an exemption, waiting on documentation, or dealing with a denied exemption request, understanding your immediate options can help.

Schools typically deny or delay enrollment for:

• Incomplete vaccination records: Missing doses or documentation
• Denied exemption requests: The state rejected an exemption application
• Expired exemptions: In states requiring annual renewal, outdated exemptions
• Procedural errors: Forms that weren’t properly completed, notarized, or submitted correctly
• Missed deadlines: Documentation submitted after enrollment deadlines

If this happens, there are a few immediate steps you need to take:

• Get it in writing: Request written documentation explaining the specific reason for denial
• Ask about provisional enrollment: Many states allow temporary attendance (typically 30-90 days) while resolving documentation issues
• Review state requirements: Use the tables in this article to verify what your state actually requires
• Understand appeal options: Many states have formal processes to appeal denied exemptions
• Document everything: Keep copies of all forms, medical records, and correspondence

Consider consulting an attorney if your exemption request was denied despite meeting all stated requirements. Some other reasons to seek legal advice can include:

• The school is applying requirements that conflict with state law
• You’ve received conflicting information from different officials
• Provisional enrollment is expiring without resolution
• Your child has already missed significant school time

An education attorney can review your specific circumstances, identify whether your rights have been violated, and help you pursue appeals or other remedies.

Legal Guidance

Whether you’re starting your first child in school or need some help navigating a complicated exemptions process, this can be an overwhelming time. The rules can sometimes be hard to follow. In many situations where health, rights, or personal convictions are at stake, it can be invaluable to consult an attorney.

You can share details with them confidentially. They can help you understand your options. That way, you’ll be able to determine the best way to proceed.

If you don’t have an education attorney or aren’t quite sure how to vet someone you can trust, you’re not alone. FindLaw’s directory of qualified education attorneys is free, publicly accessible, and can help you get started. When you select your location, you’ll be able to review all sorts of information on experts in your locale, such as ratings, background, track records, and credentials.

Try to find someone with experience in matters like yours, and get a case review. Informed decisions can often be the key to moving forward.