Some authorities are favourable to put together postvaccinal encephalitis, post-measles encephalitis and some encephalopathies after prophylactic treatments under the concept of secondary enceph alitis.
But I preferas a virologist to regard postvaccinal encephalitis as a modified infection with vaccinia virus, in another hand, postmeasles encephalitis as a type of infections of nervous system with measles virus.
Because of the dissociation between etiology and pathogenesis, the morphological concept of secondary encephalitis is not so good for making clear the etiology of these encephalitides.
