translation.en: The disease is usually mild, but more severe clinical presentation with neurological symptoms (meningitis and encephalitis) may occur, sometimes resulting in death.
translation.lv: Parasti slimība ir viegla, bet var rasties smagāki klīniskie gadījumi ar neiroloģiskiem simptomiem (meningītu un encefalītu), kas dažreiz izraisa nāvi.