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Components of Vaccines

Vaccines are produced with a variety of ingredients or components including antigens, stabilizers, adjuvants, and preservatives.

According to the CDC, vaccines may have been manufactured with excipients including: suspending fluid (e.g. sterile water, saline, or fluids containing protein);preservatives and stabilizers to help the vaccine remain unchanged (e.g. albumin, phenols, and glycine); and adjuvants or enhancers to help the vaccine to be more effective. The Institute for Vaccine Safety lists these components, by vaccine, here.


For a list of vaccines containing aluminum, thimerosal, formaldehyde and other excipients, please see the Institute for Vaccine Safety at John Hopkins Bloomberg School of Public Health.

According to the CDC, common substances found in vaccines also include:

  • Aluminum
  • Antibiotics
  • Egg protein
  • Formaldehyde
  • Monosodium glutamate(MSG)
  • 2-phenoxy-ethanol
  • Thimerosal

For a full list of vaccine ingredients, please see package inserts (listed by vaccine) from the Institute for Vaccine Safety at John Hopkins Bloomberg School of Public Health. 

Temporal Association of Certain Neuropsychiatric Disorders Following Vaccination of Children and Adolescents: A Pilot Case–Research Study

Background: Although the association of the measles, mumps, and rubella vaccine with autism spectrum disorder has been convincingly disproven, the onset of certain brain-related autoimmune and inflammatory disorders has been found to be temporally associated with the antecedent administration of various vaccines. This study examines whether antecedent vaccinations are associated with increased incidence of obsessive–compulsive disorder (OCD), anorexia nervosa (AN), anxiety disorder, chronic tic disorder, attention deficit hyperactivity disorder, major depressive disorder, and bipolar disorder in a national sample of privately insured children. Read more


CDC Contraindications to Vaccines

CDC Vaccines and Immunizations

World Health Organization

Nurses Against Mandatory Vaccines (joined with Physicians for Informed Consent as of 2017)

Vaccine Policy and Law - reforming vaccine policy and law, knowing your rights, and vaccine exemptions

Vaccines and vaccine safety: 


Age of Autism

Generation Rescue

National Autism Association

Autism One

Vaccine Impact

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