<prompt> Ramba uchinyora ndima iyi - Shanduko yemaindasitiri mumakore ekuma1700 yakaunza nyaya dzakawanda dzehutano hweveruzhinji dzinokonzerwa nekukurumidza kukura kwemaguta uye kusava nehutsanana, mamiriro akaita kuti pave nekugadzirwa kwemamepu ezvirwere, kana kuti makadhi ezvokurapa. Chimwe chinhu chakatangira nhau dzezvokurapa, mapikicha ezvokurapa akabuda mukudiwa kwokutaura kusawirirana kwenzvimbo munjodzi yezvirwere zvisingazivikanwi, zvikurukuru kupararira kwemaguta kwekorera uye yellow fever. Mumwe wevanhu vakakurumbira zvikuru mune zvose zviri zviviri epidemiology uye geography yokurapa ndiJohn Snow, chiremba uyo akaruramisa manyuko okutapurwa mukati mokuputika kwekorera kweBroad Street muna 1854  <response>: . Mepu yaSnow yakakurumbira ya1854 yokubuda kwecholera inoratidza zvakajeka kuti zvirwere zvacho zvaiva zvakapoteredza pombi yeBroad Street, kwaibva mvura yakasvibiswa iyo yakaparira denda racho. Mepu iyi yakaita kuti Snow azive pombi yakanga yakasvibiswa ndokufunga kuti korera chirwere chinopomeranwa nemvura, chinhu chinoshamisa sezvo utachiona hwakanga husingazivikanwi nesayenzi panguva iyoyo. Nepo mipiro yaSnow kunyaya dzezvokurapa uye dzezvirwere isingarambiki, basa remepu iri muchirongwa ichi chaicho chokutsvakurudza rakanyanyowedzeredzwa. Mapepa emapoinzi ezviitiko zvakagadzirwa munguva yeindasitiri zvaive zvishandiso zvine simba mukutaurirana zvakawanikwa neyakajairika epidemiological zviyero zvekubatana, asi basa razvo semidziyo yekuongorora rakaganhurirwa nekuda kwekukanganisa kwehunyanzvi. 