 Nyora kupfuurira kweiyi ndima - Akapedza yakawanda yama 1990 achidzidza HIV nemishonga yokudzivirira. Somukuru wezvirwere zvinotapuriranwa paWashington Hospital Center, akanga ashanda mukugadzirira pamusoro pechaizoitwa kana pakava nokusunungurwa nemaune kwechinhu chinotapurira. Izvi zvakatanga kushanda apo pashure pokurwiswa kwaSeptember 11 muna 2001, mishonga inorwisa mabhakitiriya yakanga yagadzirira kurwiswa neanthrax kwakatevera. Gare gare akagadzira nzira yokuronga nayo chirwere cheanthrax chinofemerwa uye akatsigira kuunganidzwa kwemvura inobva muchipfuva kuti chirwere chacho chirapwe kana mvura ine chepfu ikaungana mumapapu. 