<prompt> Subacute sclerosing pan- encephalitis is associated with-MumpsMeaslesRubellaTyphoid  <response>: The more serious neurological complications of measles include febrile convulsions, encephalitis, subacute sclerosing pan-encephalitis SSPE SSPE characterized by progressive mental deterioration leading to paralysis, involuntary movements, muscle rigidity and coma. Frequency of SSPE is about 1:300,000 cases of natural measles. Ref:PARK;S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 23rd edition , Page:148. 