http://www.cdc.gov/vaccines/vac-gen/additives.htm
This is from the Center for Disease Control's own website.
Aluminum gels or salts of aluminum which are added as adjuvants to help the vaccine stimulate a better response. Adjuvants help promote an earlier, more potent response, and more persistent immune response to the vaccine.
See also: "Aluminum in Vaccines: What you should know" [ 579KB / 2 pages] Also available in Spanish [579KB / 2 pages]
Antibiotics which are added to some vaccines to prevent the growth of germs (bacteria) during production and storage of the vaccine. No vaccine produced in the United States contains penicillin.
Egg protein is found in influenza and yellow fever vaccines, which are prepared using chicken eggs. Ordinarily, persons who are able to eat eggs or egg products safely can receive these vaccines.
Formaldehyde is used to inactivate bacterial products for toxoid vaccines, (these are vaccines that use an inactive bacterial toxin to produce immunity.) It is also used to kill unwanted viruses and bacteria that might contaminate the vaccine during production. Most formaldehyde is removed from the vaccine before it is packaged.
Monosodium glutamate (MSG) and 2-phenoxy-ethanol which are used as stabilizers in a few vaccines to help the vaccine remain unchanged when the vaccine is exposed to heat, light, acidity, or humidity.
Thimerosal is a mercury-containing preservative that is added to vials of vaccine that contain more than one dose to prevent contamination and growth of potentially harmful bacteria.
I am allergic to some antibiotics and I surely do not want aluminum and mercury injected into me. I don't care how small the amount is because if we are forced to take flu shots every year, we don't know how much of these metals build up and where it lands in the body. If I am not mistaken, I do not think that the body eliminates heavy metals unless you produce lots of glutathione. Trouble is...the older one gets, the less glutathione (which removes metals and other toxins) is available. Since there is only so much glutathione in the body, toxins can overwhelm the body defenses and ability to remove toxins.
I am also allergic to MSG. I ate some chicken from a well-known chicken restaurant yesterday and within an hour I thought my head was going to explode from the pain. I won't eat any more of that stuff. I don't want that stuff injected into me.
And aluminum...well what can I say about that? Aluminum is said to be a major factor in alzheimers disease. Of course it is in so many products we use. Even in baking soda and deodorant. blah!