It is easier yo explain ONE way that vaccines can cause brain damage, which is related to all kinds of neurological (brain) probelms. Basically it is because adjuvants, or things they put in the vaccine cause an elevated immune response, such as Thimerasol or Aluminum, are severe neurotoxins. Small particles of those can bypass the blood-brain barrier and lodge themselves in the brain, thereby activating the brains defense mechanisms. The brain releases defense squads, which use "weapons" called excitotoxins to attack the "invading" stuff from the vaccines. Unfortunately, the stuff that defends the brain can harm the brain as well. So, Joe gets a vaccine. The SUPER toxic crap finds its way to his brain, and unluckily, parks itself near a part of the brain that effects speech. This may only happen to a small percentage of people who get the vaccine, but it happens to poor Joe. Suddenly, Joe begins to develop a speech problem! But since the Doctors are not all neurologists, and only get their information from the lying vaccine companies, they do not realize what has happened, and cant report the negative effects from the vaccine. If you want to know more, call me. I have weeks of reading material/ studies available. Remember, most people have an ego-driven, SOLIDLY PROGRAMMED idea in their heads that vaccines are the holy grail of modern science, and anybody who says otherwise INCLUDING THE INDEPENDENT RESEARCHERS WHO VERIFY THESE PRINCIPLES THROUGH SCIENTIFIC STUDIES. must be a "quack". This is erroneous thinking, and is a main cause of many uneccesary vaccine injuries. They simply DO NOT KNOW THAT THEY DON'T KNOW, and they can be DANGEROUS, because they can become convinced that it is "necessary" to force others to get vaccines.