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 Aristotle’s idea of miasma as the cause of disease.