Excellent post, Nick!!! The most important statement that jumps off the page is:Vaccines are capable of mounting a peripheral immune response that can penetrate the blood brain barrier That's all you need to know as a layman!!! For example, attempted treatments for epilepsy have been cut off at the knees because of a myriad of blood brain barriers issues and the list goes on forever for treatments for all kinds of diseases that cannot navigate the blood brain barrier.