Cika wannan jumla mai zuwa: Wannan yanki ya shahara ga cutar kwalara
cutar a 1854 wanda ya haifar da farkon amfani da ka'idodin cututtukan cututtukan cututtukan cututtuka don magance matsalar. John Snow, likitan da ya gane cewa shari'o'in sun taru a kusa da famfo a kan Broad Street ya sanar da binciken a kan zane-zane na taswira. Hakan ya haifar da toshe famfo kuma raguwar cutar kwalara ta kasance cikin sauri.