Acute infectious disease (disorder) {63171007 , SNOMED-CT } Acute nervous system disorder (disorder) {127341005 , SNOMED-CT } Acute viral disease (disorder) {409631000 , SNOMED-CT } Cerebellar ataxia (disorder) {85102008 , SNOMED-CT } Herpes virus infection of the central nervous system (disorder) {406586005 , SNOMED-CT } Infectious disease of brain (disorder) {128614008 , SNOMED-CT } Infective disorder of head (disorder) {363166002 , SNOMED-CT } Neurological varicella (disorder) {240468001 , SNOMED-CT } Secondary cerebellar degeneration (disorder) {230241000 , SNOMED-CT } Viral infection of central nervous system (disorder) {128118007 , SNOMED-CT } Viral infection of central nervous system (disorder) {302810003 , SNOMED-CT }