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 except for older people who may have met unless they met the same virus.
translation.mt: F’intervalli regolari, ġeneralment ta’ ftit deċenni, ifeġġ virus ġdid tal-influwenza li jkun ġdid għan-nies kollha jew għal ħafna min-nies li jfisser li jista’ jkun hemm ftit immunità speċifika fost il-bnedmin ħlief għall-persuni akbar fl-età li setgħu ltaqgħu mal-istess virus.