It's the start of another school year, so it's time to make sure Junior is up to date with all of his vaccinations.

But do you actually know what your child is getting in those shots?

Many parents believe that vaccines contain a weakened version of the virus, so the recipient's body can develop an immunity without actually getting sick. And they're partially right. There is some form of live or dead virus in each and every vaccine.

But vaccines also contain preservatives, adjuvants (substances that stimulate the immune system to react more strongly to the virus), antibiotics and bits of the material the virus was cultured in.

Now before I go any further, let me say one thing … I'm not trying to persuade you to not vaccinate your child. The intent of this article is for you to be informed, so you can make the best decisions for yourself and your family.

That said, I'm going to go ahead and tell you something your doctor probably won't …

… Vaccines are loaded with heavy metals, cancer-causing substances, toxic chemicals and untested antibiotics.

They're extremely toxic and can cause serious – even deadly – reactions in susceptible people.

Here is a list of some of the more disturbing and dangerous ingredients you'll find in common vaccines:

2-Phenoxyethanol is an anti-bacterial agent being used as a replacement for the preservative Thimerosal (mercury). It's considered a very toxic material that could cause a boatload of side effects, including behavioral disorders … vomiting … diarrhea … visual disturbances … convulsions … rapid heart rate … central nervous system disorders … depression … kidney, liver and blood disorders … and reproductive defects.

Aluminum shows up in vaccines in many forms – like aluminum phosphate, aluminum hydroxyphosphate sulfate and aluminum hydroxide, to name a few. It works as an "adjuvant" to stimulate your immune system's response to the virus in the vaccine.

The problem is … aluminum is a particularly dangerous neurotoxin. It has the ability to slip past your body's natural defenses and enter your brain – potentially causing brain damage … Alzheimer's disease … dementia … convulsions … and coma. Human and animal studies have shown that aluminum can even cause nerve death.

The government is well aware of aluminum's toxic nature – it's actually recognized as a hazardous chemical on two different federal regulatory lists.

Ammonium Sulfate is a substance commonly added to pesticides. It's not known at this time if it's cancer-causing, but it has been suspected of gastrointestinal, liver, nervous system and respiratory system toxicity.

Beta-Propiolactone ranks high as a hazardous chemical on at least five federal regulatory lists. It caused lymphomas and hepatomas after being injected into lab mice, but its true effect on humans is not known. Due to animal study results, the International Agency for Research on Cancer (IARC) has classified beta-propiolactone as a possible human carcinogen.

Formaldehyde is used as a preservative to stabilize the vaccine. It's a colorless, flammable, strong-smelling chemical that's mostly used in industry to manufacture building materials and produce many household products.

Plus, it's also used to embalm – and preserve - dead bodies. (Remember the frog in your high school biology lab?)

Formaldehyde is suspected of weakening the immune system and causing neurological system damage … genetic damage … metabolic acidosis (excessive blood acidity) … circulatory shock … respiratory insufficiency … and acute renal (kidney) failure. It's been classified as a known human carcinogen (cancer-causing substance) by IARC and is ranked as one of the most hazardous compounds on at least eight federal regulatory lists.

Formalin helps preserve the vaccine. It's a mixture of formaldehyde, methanol and water. It's mostly used to preserve tissue samples in health care laboratories and presents the same danger to your health as formaldehyde does.

Gentamicin Sulfate is an antibiotic that 's been known to cause deafness or loss of equilbrioception (sense of balance). It can also be highly nephrotoxic (damage your kidneys) if multiple doses accumulate over time.

Monosodium Glutamate (MSG) excites and poisons your cells and tissues. It's used as a stabilizer in vaccines and is also found in many processed foods.

MSG has been shown to cause retinal degeneration … behavior disorders … learning disabilities … reproductive disorders … obesity … and even lesions on the brains of lab animals. Allergic reactions to MSG can be severe.

MRC-5 Cellular Protein is human diploid cells taken from aborted human fetuses. They're used as a culture to grow the virus.

Neomycin is an antibiotic that has been shown to have multiple effects on your body. It can be a neurotoxin and an ototoxin (affect hearing and balance). It also can cause respiratory paralysis, kidney damage and kidney failure. Plus, it retards your vitamin B6 absorption, sometimes leading to mental retardation and epilepsy. Some allergic reactions to neomycin can be life threatening.

Octoxinol-9 is a vaginal spermicide.

Phenol is included in vaccines to help stimulate immune response. Instead, it does the opposite – by inhibiting phagocytic activity. Phagocytes are your body's first line of defense. They engulf and digest antigens and activate the other elements of your immune system. Phenol's phagocytic-inhibiting effect actually hinders your immune system from properly dealing with the pathogens that are entering your body through the vaccine.

Phenol is used in the production of drugs, weed killers and synthetic resins, so you can imagine the effect it has on the human body. It's considered to be toxic to your cardiovascular, gastrointestinal, nervous, reproductive and respiratory systems … your liver … your kidneys … and your skin.

This doesn't surprise our government at all. It's included phenol as a hazardous chemical on at least eight federal regulatory lists.

Phenol is so deadly that is was used by the Nazis as a means of extermination during the World War II. Phenol injections were given to thousands of people in concentration camps – especially at Auschwitz-Birkenau – to kill those who were mentally ill, had incurable tuberculosis and were permanently incapable of work.

Polymyxin B is an antibiotic with some nasty side effects - neurotoxicity and acute renal tubular necrosis (the most common cause of kidney failure).

Polysorbate 80 (Tween-80) works as a stabilizer in the vaccine. It's used in a wide variety of products including ice cream, milk products, vitamin tablets, lotions and creams and medical products like vaccines and anti-cancer medications.

But it's not as safe as it sounds. According to the December 2005 issue of Annals of Allergy, Asthma and Immunology, polysorbate 80 can affect your immune system and cause severe anaphylactic shock, which can kill. It also causes cancer in animals.

Streptomycin is an antibiotic. Its main side effect is ototoxicity – the loss of hearing.

Thimerosal is used as a preservative in the vaccine. It contains 49.6% mercury by weight and has been implicated in many health conditions, such as cardiovascular disease … autism … seizures … mental retardation … hyperactivity … dyslexia … and many more nervous system conditions.

The mercury used in vaccines is second in toxicity only to the radioactive substance, Uranium. It's a powerful neurotoxin that can damage the entire nervous system of an infant in no time.

The U.S. Government is well-aware of mercury's health hazards. In 1999, they instructed vaccine manufacturers to remove it from their vaccines – and many did. However, you can still find this dangerous toxin in smaller quantities in vaccines on the market today.

The thing is … even "mercury free" vaccines can contain 0.05 mcg of mercury, which is enough to permanently damage a susceptible infant. To make matter even worse, mercury accumulates in fat – especially in the fat cells of your brain – so multiple doses of vaccines received over the years can cause it to build to dangerous levels in your body.

Plus, the inclusion of aluminum and even formaldehyde with the mercury in the vaccine magnifies the problem. Aluminum can make the mercury 100 times more toxic. Toss in formaldehyde as well, and one independent study found that mercury toxicity was increased by 1,000 times.

The American Academy of Pediatricians says it best: "Mercury in all of its forms is toxic to the fetus and children and efforts should be made to reduce exposure to the extent possible to pregnant women and children as well as the general population."

These toxic substances have found their way into the majority of vaccinations that you and your child are receiving. For a breakdown of the ingredients in specific vaccines, please see below compiled by the CDC. It contains the Vaccine, Microbes and Other Additives:

Chicken Pox
-Varivax Varicella live virus Neomycin
--Ethylenediamine-Tetraacetic Acid Sodium (EDTA)
--Potassium Chloride
-Potassium Phosphate Monobasic
--Sodium Phosphate Monobasic
--Sucrose
--Monosodium glutamate (MSG)
--Gelatin
--Bovine albumin or serum
--MRC-5 cellular protein

Diphtheria – Tetanus – Pertussis (whooping cough)
-Tripedia Corynebacterium diphtheria toxiod* … Clostridium tetani (tetanus) toxoid* … and Acellular bordetella pertussis adsorbed Aluminum Potassium Sulfate
--Ammonium Sulfate
--Formaldehyde or Formalin
--Sodium phosphate
--Thimerosal
--Polysorbate 80 (Tween-80)
--Gelatin
--Bovine extract

Hepatitis
-Havrix
--Hepatitis A Hepatitis A virus Neomycin Sulfate
--Formaldehyde or Formalin
--Aluminum Hydroxide
--Amino Acids
--2-Phenoxyethanol
--Phosphate buffers
--Polysorbate
--MRC-5 cellular protein

Vaqta
-Hepatitis A Hepatitis A virus Aluminum Hydroxyphosphate Sulfate
--Bovine Albumin or Serum
--DNA
--Formaldehyde or Formalin
--Sodium Borate
--MRC-5 cellular protein

Engerix-B
-Recombinant Hepatitis B Genetic sequence of the hepatitis B virus that codes for the surface antigen (HbSAg), cloned into GMO yeast Aluminum Hydroxide
--Phosphate buffers
--Thimerosal
--Yeast protein

Recombivax
-recombinant hepatitis B Genetic sequence of the hepatitis B virus that codes for the surface antigen (HbSAg), cloned into GMO yeast Aluminum Hydroxyphosphate
--Sulfate
--Amino acids
--Dextrose
--Formaldehyde or Formalin
--Mineral salts
--Potassium Aluminum Sulfate
--Soy peptone
--Yeast protein

Twinrix
-Hepatitis A & B Live, attenuated vaccine Aluminum Hydroxide
--Aluminum Phosphate
--Amino acids
--Dextrose
--Formaldehyde or Formalin
--Inorganic salts
--Neomycin sulfate
--2-Phenoxyethanol
--Phosphate buffers
--Polysorbate 20
--Thimerosal
--Vitamins
--Yeast protein
--MRC-5 cellular protein

Human Papillomavirus (HPV)
-Gardasil Based on HPV antigens that are proteins. These proteins are used to make four different types of “virus-like particles,” or VLPs, which correspond to HPV types 6, 11, 16, and 18. The four types of VLPs are then combined to make the vaccine.
--Amino Acids
--Amorphous Aluminum Hydroxyphosphate Sulfate
--Carbohydrates
--L-histidine
--Mineral salts
--Polysorbate 80
--Sodium Borate
--Vitamins

Influenza (the flu)
-Afluria Influenza virus (inactivated) Beta-Propiolactone
--Calcium Chloride
--Neomycin
--Ovalbumin (from eggs)
--Polymyxin B
--Potassium Chloride
--Potassium Phosphate
--Sodium Phosphate
--Sodium Taurodeoxychoalate

Fluarix
-Three strains of type A and B influenza viruses Egg albumin (Ovalbumin)
--Egg protein
--Formaldehyde or Formalin
--Gentamicin
--Hydrocortisone
--Octoxynol-10
--a-Tocopheryl Hydrogen Succinate
--Polysorbate 80
--Sodium Deoxycholate
--Sodium Phosphate
--Thimerosal

Fluvirin
-Influenza virus Neomycin
--Polymyxin B
--Beta-Propiolactone
--Polyoxyethylene 9-10 Nonyl Phenol
--Thimerosal
--Egg protein

Flulaval
-Inactivated influenza type A & B viruses Egg albumin (Ovalbumin)
--Egg protein
--Formaldehyde or Formalin
--Sodium Deoxycholate
--Phosphate buffers
--Thimerosal (25 mcg of mercury per dose)

Fluzone
-Three inactivated type A & B influenza viruses Egg protein
--Formaldehyde or Formalin
--Gelatin
--Octoxinol-9 (Triton X-100)
--Thimerosal (In multidose vial, 25 mcg of mercury per dose)

FluMist
-Live influenza virus Chick kidney cells
--Egg protein
--Gentamicin Sulfate
--Monosodium Glutamate (MSG)
--Sucrose Phosphate Glutamate buffer

Measles – Mumps – Rubella
-MMR-II Measles, mumps, rubella live virus
--Amino acid
--Bovine Albumin or Serum
--Chick embryo fibroblasts
--Human serum albumin
--Gelatin
--Glutamate
--Neomycin
--Phosphate buffers
--Sorbitol
--Sucrose
--Vitamins

Measles – Mumps – Rubella – Varicella (MMRV)
-ProQuad Live measles, mumps, rubella and varicella (chicken pox) viruses
--Neomycin
--Gelatin
--Monosodium L-glutamate (MSG)
--Potassium chloride
--Potassium phosphate monobasic
--Potassium phosphate dibasic
--Sodium bicarbonate
--Sodium phosphate dibasic
--Sorbitol
--Sucrose
--Human Serum Albumin
--MRC-5 cellular protein
--Bovine Albumin or serum

Meningococcal
-Menactra
-N meningitidis A, C, Y and W-135 strains
--Formaldehyde or Formalin
--Phosphate buffers

Menomune
-Freeze-dried polysaccharide antigens from Neisseria meningitidis bacteria
--Thimerosal (10-dose vials only)
--Lactose

Polio
IPOL
-3 types of polio viruses
--Neomycin
--Streptomycin
--Polymyxin B
--Formaldehyde or Formalin
--2-Phenoxyethenol
--Calf serum protein
--Monkey kidney tissue

Rotavirus
RotaTeq
-5 live rotavirus strains
--Cell culture media
--Fetal Bovine Serum
--Sodium Citrate
--Sodium Phosphate Monobasic Monohydrate
--Sodium Hydroxide Sucrose
-Polysorbate 80

Rotarix
-Live attenuated human rotavirus
--RIX4414 strain
--Amino acids
--Calcium Carbonate
--Calcium Chloride
--D-glucose
--Dextran
--Ferric (III) Nitrate
--L-cystine
--L-tyrosine
--Magnesium Sulfate
--Phenol Red
--Potassium Chloride
--Sodium Hydrogenocarbonate
--Sodium Phosphate
--Sodium L-glutamine
--Sodium Pyruvate
--Sorbitol
--Sucrose
--Vitamins
--Xanthan

* A toxoid a bacteria toxin whose toxicity has been weakened or suppressed by chemical or heat treatment for use in vaccines.
** A vaccine is a "pox-type" virus related to smallpox.

Please note that many vaccines also contain egg products, so if you are one of the many people sensitive to eggs, you may want to avoid those vaccines.

The main point I'm trying to get across here is this …

… Don't say yes to a vaccine for you or your child just because your doctor says it's safe. It's highly likely that he doesn't even know what ingredients are in the vaccine.

Instead, ask your doctor for the ingredient insert. You have a right and a responsibility to look at what is being injected into you or your child's body.

Author's Bio: 

Deanna Blanchard is a health writer for NewsBlarg.com. NewsBlarg.com is a free, no-spin news website that features headlines and commentary on politics, finance, health, and better living as well as features interactive, user-generated petitions, blogs and videos.