Nyaya dzechirwere chetsoko dziri kuramba dzichiwedzera pasi rose. Sekureva kweWorld Health Organization (WHO),nyika dzinosvika makumi maviri nenomwe, kunyanya muEurope neNorth America, vane vanhu vakasimbiswa kuti vane chirwere ichi. Mimwe mishumo yakawana vanhu vakasimbiswa kuti vane chirwere ichi.muanopfuura makumi matatu.

Mamiriro acho ezvinhu haasi ekuti achatoitikakuchinja kuita denda, asi pane zvimwe zviratidzo zvinonetsa. Pamwe chinhu chikuru chinonetsa ndechekuti havasi vese vane chirwere ichi vanoratidzika kunge vane hukama, uye vamwe vane chirwere ichi havana hukama hwakajeka nedenda riripo. Izvi zvinoratidza dambudziko rekutsvaga vanhu vari kubatwa nechirwere ichi, uye zvinoratidza kuti vazhinji vane chirwere ichi havasi kuonekwa.