A very rare and slow-forming infection of the brain caused by a defective measles virus. Other members of the group include the following: progressive rubella panencephalitis, caused by the German measles virus; kuru, a fatal disease of cannibals in New Guinea; and Creutzfeld-Jakob disease, the human form of "mad cow disease."

Subacute Sclerosing Pan Encephalis

a rare chronic progressive encephalitis caused by the measles virus and occurring primarily in children and young adults; death usually occurs within three years; characterized by primary measles infection before the age of two years

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