During the 1854 epidemic, Snow tested his theory by studying the lives of those who had contracted cholera in the London district of Soho. ‘ What do they have in common? ’
Lai pārbaudītu savu teoriju, Džons Snovs 1854. gada epidēmijas laikā pētīja, kādos apstākļos ir dzīvojuši londonieši, kas saslimuši ar holeru Soho rajonā.