Vaccines are grown in host of several origins, some in eggs and some in monkey kidneys and others in many more animal hosts.

When they remove the virus from the host, there are contaminates from the host it is grown in that gets left in the content of the solution. This could be other viruses or parts of the host, and they are never checked for dangers of the contaminate.

This information is from a researcher that worked in these research centers for over 10 years and was disgusted about the quality of vaccines.

When a vaccine is injected into your muscle and alerts your immune system there is a foreign substance in your body, the immune system then sends killer cells to kill it and make it safe for your body. It then makes antibodies for that substance and then when it ever enters your body again the immune system is supposed to recognize it and destroy it.

That's the theory of vaccines. BUt if you have a weakened immune system, it can't make the antibodies to protect you, so vaccines will only work if you have a strong immune system and then some times it just don't work anyway.

The contaminates in vaccines are very dangerous, as the preservative they use is Thimerosal (Mercury or and Aluminum) which gets stored in the fatty tissue in your brain, and causes brain damage, especially in infants and unborn infants. Which much evidence is it causes Autism and many other behavioral problems in the child, as their brains are developing for the first two years.

I have placed a video on this subject with Dr.s Mercola and Blaylock discussing this and making the subject very understandable, on my blog, There are 9 videos that run concurring and if I was you and needed information on all vaccines, I would watch all 9 of them,

Also on the sidebar under Pandemic, there is the article about the researcher that worked for 10 years in those labs on vaccine. Very interesting article.

http://www.my-healthy.info/4u

I hope I have enlightened you about my opinion on vaccines and if they are safe or not.