translation.en: Due to a series of factors, a very low proportion of carriers (less than 1%) will eventually become ill. This most frequently occurs in young children, but a second disease peak is observed among adolescents and young adults.
translation.mt: Minħabba serje ta' fatturi, proporzjon baxx ħafna ta' trasportaturi (inqas minn 1%) eventwalment jimirdu. Dan iseħħ l-aktar fi tfal żgħar, iżda t-tieni quċċata tal-marda hija osservata fost l-adolexxenti u l-adulti żgħar.