In 1840, surgeon George Bodington noted that those who worked in the open air ​ — farmers, plowmen, shepherds — ​ were generally free of TB, while those who spent much of their time indoors seemed more susceptible to it.
Më 1840 kirurgu Xhorxh Badington vuri re se ata që punonin jashtë, si bujqit, lëruesit e barinjtë, në përgjithësi nuk kishin TB, ndërsa ata që e kalonin shumicën e kohës mbyllur dukej se prekeshin më lehtë.