Zizigidi-gidi zabantu ehlabathini jikelele abathe bagonywa kwaye kuqikeleleka ukuba oku kusindise imiphefumlo yabantu engaphaya kwama-250,000 ngonyaka. Oku kungasetyenziswa ngokukhuselekileyo kuwo onke amaqela obudala babantu. Bamalunga neepesenti ezingama-35 ukuya kwezingama-45 abantu abaye bakhulelwa sisiqingatha sexesha elifutshane lebala elibomvu kunye nentlungu kwindawo abatofwe kuyo. Bamalunga neepesenti ezi-5 ukuya kwezili-15 abantu abanokuba nomkhuhlane, iintloko ezibuhlungu, okanye isicaphu-caphu. Emva kokuba semngciphekweni kumgada akukho zinto zithintela ukusetyenziswa kwayo. Inkoliso yogonyo ayinazo ii-thimerosal. Ugonyo olwenziwe kwizicwili zemithambo-luvo lusetyenziswa kumazwe ambalwa, ingakumbi eAsiya ne-Latin America, kodwa azisebenzi kakhulu kwaye zineziphumo ezikhulu ezibi. Ukusetyenziswa kwazo ngoko akucetyiswa yi-World Health Organization.