The Claim in Context 

Misinformation about vaccines has led to fear and confusion about their necessity and safety. These concerns conflict with decades of scientific research confirming that vaccines are one of the most effective tools for preventing serious diseases. 

 

Key Facts

  • Vaccines are the safest and most effective way to prevent the spread of infectious diseases, including measles, whooping cough and polio.
  • High vaccination rates protect everyone in the community, especially children. 
  • Vaccines undergo rigorous testing before approval and continuous monitoring to ensure safety and effectiveness.
  • Routine childhood vaccinations teach children’s immune systems to recognize and resist disease, 
  • A vast majority of Americans are vaccinated. Latest information from the CDC shows that more than 90 percent of children born during 2019–2020 are vaccinated against the polio virus, hepatitis b, measles, and varicella. 
  • Scientific research confirms that vaccines are safe and effective—and they protect children and teens from serious diseases. 

Evidence Snapshot 

Immunizations have drastically reduced the incidence of vaccine-preventable diseases. The AAP, alongside the Centers for Disease Control and Prevention (CDC), rigorously reviews vaccine safety and effectiveness data. The current U.S. childhood immunization schedule is backed by extensive research to maximize protection while minimizing risks. 

The AAP emphasizes that delaying or avoiding vaccinations leaves children vulnerable to serious infections, some of which can be fatal. 

Why It Matters 

Immunization prevents disease outbreaks, reduces healthcare costs, and protects the most vulnerable individuals in society. Public trust in vaccines is essential to maintaining high immunization rates and preventing the resurgence of deadly diseases. 


Experts Say: 

“Vaccines are one of the greatest public health achievements of our time. They are safe, effective, and crucial for keeping children and communities healthy.” 


— Dr. Sean O'Leary, MD, MPH, FAAP, American Academy of Pediatrics Chair of the Committee on Infectious Diseases

Resources for Further Information

Vaccine Safety

U.S. Department of Health and Human Services (HHS)

Vaccine Safety: Examine the Evidence

HealthyChildren.org

Vaccines & Immunizations

Centers for Disease Control and Prevention (CDC)

Last Updated

03/20/2025

Source

American Academy of Pediatrics