Vaccine Safety

Concerns related to the safety of vaccines vary. In this section of our website, you will find that we address a variety of these concerns. For convenience we have grouped them as shown below. By clicking through to each section, you will find out more about what topics we cover. If you can’t find something, you can try using the search tool at the top right of each webpage or you can contact us using this form.

Vaccine Ingredients

Many questions about vaccines revolve around the ingredients in the vaccine vial. Learn why certain ingredients are used, the quantities present in vaccines, and the safety of vaccine ingredients.

Find out more about vaccine ingredients

Vaccines and Other Conditions

Most people agree that vaccines protect against the diseases they are meant to protect against. However, some people wonder whether vaccines are also causing other conditions in exchange for that protection, such as asthma, autism and multiple sclerosis.

Check out what we know about these concerns

Other Vaccine Safety Concerns

This section addresses safety concerns not related to ingredients or other conditions, including questions about vaccine dosing, fevers, the blood-brain barrier (BBB), and antibody-dependent enhancement (ADE).

Go to this section