Why would encephalitis be a mystery?
Encephalitis can occur as a secondary immunologic complication of certain viral infections or vaccinations. Inflammatory demyelination of the brain and spinal cord can occur 1 to 3 wk later (as acute disseminated encephalomyelitis); the immune system attacks one or more CNS antigens that resemble proteins of the infectious agent. The most common causes used to be measles, rubella, chickenpox, and mumps, smallpox vaccine; and live-virus vaccines (eg, the older rabies vaccines prepared from sheep or goat brain)’ Source: http://www.merck.com/mmpe/sec16/ch217/ch217c.html?qt=encephalitis&alt=sh#sec16-ch217-ch217c-1010 So even the vaccine manufacturer’s know that vaccines cause encephalitis – hardly a ‘mystery’!
