<prompt> SSPE is a rare complication ofMumpsMeaslesRubellaInfluenza  <response>: B Measles SSPE: It is characterized by a history of primary measles infection usually before the age of 2 years, followed by several asymptomatic years 6-15 on average, and then gradual, progressive psychoneurological deterioration, consisting of personality change, seizures, myoclonus, ataxia, photosensitivity, ocular abnormalities, spasticity, and coma. Pathologic changes are firstly observed in the white matter of the hemisphere. 