Public-Health Aspects of the Virus Encephalitides

VIRUS encephalitides are best discussed in three groups: virus encephalitides caused by familiar viruses not ordinarily encephalitogenic; suspected, primary virus infections; and primary virus infections.Virus encephalitides can be caused by ordinarily nonencephalitigenic viruses, which are those of herpes simplex, measles, lymphogranuloma venereum, mumps and infectious mononucleosis (probably due to a virus). Although secondary or post-infectious encephalitis has not as yet been shown to be caused by a virus, the illness occurs within a few days to a few weeks after various virus infections, such as measles, mumps, influenza, chicken pox, vaccinia, smallpox and infectious hepatitis and after vaccination against . . .