Capitoli Da osservarsi nelli Lazaretti Stabiliti, e decretati Dagl’Illustrissimi, & Eccellentissimi Signori Sopraproveditori, Aggionti, e Proveditori alla Sanità; published in 1674 by the Magistrato alla Sanità of the Republic of Venice.
Bad air was believed to be a major cause of sickness in the past, based on the idea of humours and miasma as the cause of disease.
The black plague — or bubonic plague — is caused by a bacterium, yersinia pestis. It is one of the most virulent diseases in the world, and it has left some deep marks in the history of Venice.