The Hidden Power Behind Vaccine Recommendations

What You Need to Know About the Advisory Committee on Immunization Practices (ACIP)

Heather Wingo
December 12, 2025

Have you ever wondered who decides which vaccines your child gets at school or why your doctor recommends a flu shot every year? Behind those decisions is a group you have probably heard about in the news: ACIP. This committee helps shape vaccine policy for more than 330 million Americans, yet most people are unaware of its existence.

Why does ACIP matter?

ACIP stands for the Advisory Committee on Immunization Practices. It’s a federal committee that develops recommendations on how vaccines should be used in the United States. The Centers for Disease Control and Prevention (CDC) uses ACIP’s recommendations to set the adult and childhood immunization schedules – the very same charts you have probably seen in your doctor’s office.

ACIP was created in 1964 to provide expertise for federal immunization (or vaccine) policy as new vaccines became available and immunization programs expanded. In 1972, the ACIP was officially designated as a federal advisory committee under the Federal Advisory Committee Act, thereby granting it the authority to make recommendations to the CDC.

How does ACIP make recommendations?

The committee can have up to 19 voting members, plus one additional member who provides expertise in immunization programs. ACIP meets three times a year to review vaccine research and vote on new recommendations. Between meetings, members work in smaller groups to study data and prepare proposals.

What is the Difference Between ACIP and FDA?

ACIP’s role differs from that of the Food and Drug Administration (FDA). The FDA approves vaccines for safety and effectiveness and oversees how they’re manufactured. ACIP, on the other hand, focuses on how vaccines should be used to prevent disease in the population.

How Does ACIP Decide What to Recommend?

Before recommending a vaccine, ACIP considers:

• Benefits vs. risks: Will this vaccine prevent illness and save lives without causing harm?
• Public health impact: How much will it reduce disease in the population?
• Quality of evidence: Is the research strong and reliable?
• Fairness and access: Can everyone who needs the vaccine get it?
• People’s values: What do patients and providers think?

Sometimes, ACIP’s recommendations differ from the FDA’s approved uses. That’s because ACIP focuses on real-world disease prevention, while the FDA focuses on safety and manufacturing.

What Happens After ACIP Votes

Once ACIP votes, the CDC director reviews the recommendation. If approved, these recommendations shape the immunization schedules you see in clinics and influence:

• Which vaccines are covered by insurance
• Which vaccines are required for school or travel
• Which vaccines are provided free to eligible children under the Vaccines for Children program

Why Should You Care?

ACIP’s work impacts your health, your family’s health, and public health across the country. The committee's decisions help ensure that vaccines are used in ways that save lives and prevent disease.Vaccines protect communities, but understanding how decisions are made helps build trust and confidence. Stay informed—talk to your healthcare provider about what’s right for you and your family.

Want to learn more about what 'Trust in Translation' means and why it matters? Read the full blog here.

Reference

Sekar, K. (2025, September 15). The Advisory Committee on Immunization Practices (ACIP). Congress.gov. https://www.congress.gov/crs-product/IF12317