 Furthermore, as Islamic medicine recognized that many diseases are contagious, such as leprosy, smallpox, and sexually transmitted diseases, Ibn Sina recognized tuberculosis as a contagious disease, among others which can be spread through soil and water.The Canon of Medicine continued to be studied by European medical professionals and institutions even into the 18th century.This combination and rationalization of practical science, religion, and thought highlighted the pinnacle of Muslim medical scholarship, and the nature of the true developments which were made in the medical world.