Disease duration is 14 months on average. vCJD tends to affect younger individuals, with an average age of onset of around 28 years, compared to sporadic CJD, which tends to affect middle-aged and elderly individuals.
Bolezen traja povprečno 14 mesecev. Variantna Creutzfeldt Jakobova bolezen običajno prizadene mlajše, pri čemer je povprečna starost ob nastanku bolezni okoli 28 let, v primerjavi s sporadično Creutzfeldt-Jakobovo boleznijo, ki prizadene predvsem ljudi v srednjih letih in starejše posameznike.