Industrially manufactured bar soaps became available in the late 18th century, as advertising campaigns in Europe and America promoted popular awareness of the

Industrially manufactured bar soaps became available in the late 18th century, as advertising campaigns in Europe and America promoted popular awareness of the relationship between cleanliness and health. Also, bacteria was "discovered" by Ignaz Semmelweis, in mid 19th century. Barely anyone believes his theory. In 1847, he proposed hand washing with chlorinated lime solutions at Vienna General Hospital's First Obstetrical Clinic, where doctors' wards had thrice the mortality of midwives' wards.[3] The maternal mortality rate dropped from 18% to less than 2%... https://en.m.wikipedia.org/wiki/Ignaz_Semmelweis https://en.m.wikipedia.org/wiki/Ignaz_Semmelweis