Thirty-two patients with the age varying from 3 to 20 years who had cerebral palsy (15 cases), epilepsy (7 cases) mental retardation (7 cases) and phocomelia (3 cases) were examined by means of electroencephalography before and at certain intervals after the first and second inoculation with Japanese B encephalitis vaccine.
Of the 32 patients, only one case of epilepsy showed the marked aggravation of EEG tracing after the second vaccination, His electroencephalogram which was examined 6 months later was greately improved.
It seems extremely unlikely that electroencephalographic abnormality will be encountered after inoculation with this vaccine.
