translation.en: Smallpox was a systemic disease, officially eradicated since 1979, caused by infection with the Variola major virus, whose only reservoir was infected humans.
translation.mt: Il-Ġidri hi marda sistematika, uffiċjalment eradikata mill-1979, ikkawżata mill-virus Variola major, li l-unika riżerva tiegħu kienu l-bnedmin.