A simpler explanation for that is that people with cholera do not go to work. I looked up the event and the Wikipedia article on it [0] made mention of a monastery in addition to the brewery that went untouched by the outbreak. Unfortunately I could not find it on the outbreak map [1], nor do I have access to the source material. This is similar to how children outside of the Broad Street area who attended school near Broad Street were not recorded as having died at the school but instead in their homes.<p>[0] <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;1854_Broad_Street_cholera_outbreak#John_Snow_investigation" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;1854_Broad_Street_cholera_outb...</a><p>[1] <a href="https:&#x2F;&#x2F;upload.wikimedia.org&#x2F;wikipedia&#x2F;commons&#x2F;2&#x2F;27&#x2F;Snow-cholera-map-1.jpg" rel="nofollow">https:&#x2F;&#x2F;upload.wikimedia.org&#x2F;wikipedia&#x2F;commons&#x2F;2&#x2F;27&#x2F;Snow-cho...</a>