::::Richard Colgan, Advice to the Young Physician: On the Art of Medicine, 2009. I am afraid that Jagged's erroneous assertions are spreading outside of Wikipedia. For example  "In The Canon of Medicine (1020), Avicenna discovered the contagious nature of infectious diseases such as phthisis and tuberculosis, the distribution of diseases by water and soil, and fully understood the contagious nature of sexually transmitted diseases. In epidemiology, he introduced the method of quarantine as a means of limiting the spread of contagious diseases.". R.d. Tribhuwan. Body Image, Human Reproduction and Birth Control, 2009. ... If true, Jagged can be happy, "Mission Accomplished".