Vaccine Information Sheets:

Adjuvant (as of 08/02/25):

Please note that this is not a complete list.

Aluminum is used in some vaccines as an adjuvant—a substance that enhances the body’s immune response to the vaccine. It's been used safely in vaccines for decades. Studies show no evidence linking aluminum in vaccines to conditions like autism or developmental delays.
Regulatory agencies like the CDC, FDA, WHO, and EMA all support the continued use of aluminum-containing adjuvants as safe and effective.

Adacel: There is 1.5mg aluminum phosphate (0.33 mg of aluminum) per 0.5mL dose. Aluminum is used as an adjuvant.
IPOL: No aluminum
MenQuadfi: No aluminum
Pentacel: There is 1.5mg aluminum phosphate (0.33 mg of aluminum) per 0.5mL dose. Aluminum is used as an adjuvant.
Quadracel: There is 1.5mg aluminum phosphate (0.33 mg of aluminum) per 0.5mL dose. Aluminum is used as an adjuvant.