translation.en: At irregular intervals, usually of a few decades, a new influenza virus emerges which is novel to all or most people which means that there can be little specific immunity among humans.
translation.mt: F'intervalli irregolari, normalment xi ftit deċenni, jitfaċċa virus ġdid ta' l-influwenza li jkun ġdid għal kulħadd jew għal ħafna nies li jfisser li jista' jkun hemm ftit immunità speċifika fost il-bnedmin.