London was one of first cities of modern times to seriously tackle the problem of poor sanitation after a British doctor, John Snow, discovered in 1854 that cholera was water-borne and not air-borne as had previously being thought.
London was one of first cities of modern times to seriously tackle the problem of poor sanitation after a British doctor, John Snow, discovered in 1854 that cholera was water-borne and not air-borne as had previously being thought.
英国医生约翰．史诺在1854年发现霍乱其实是靠水散播，而非之前认为的空气传播；在此之后，伦敦成为第一批认真改进公共卫生问题的现代城市。