"Summer diarrhœa, cholera, and typhus fever [local miasmatism]"

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Laycock describes "the fever as seen in York" (228).

With respect to cholera, he offers the contingent contagion argument that "infection is not absolute under any circumstances; it is always conditional . . . as regards the recipient . . . the state of health of the organization that receives it, or even of the organs for which it has an elective affinity . . . [and on] the topography of York . . ." (234-35).