13. Encyclopedia Britannica documents that in 1845, a young doctor in Vienna named Dr. Ignaz Semmelweis was horrified at the terrible death rate of women who gave birth in hospitals. As many as 30 percent died after giving birth. Semmelweis noted that doctors would examine the bodies of patients who died, then, without washing their hands, go straight to the next ward and examine expectant mothers. This was their normal practice, because the presence of microscopic diseases was unknown. Semmelweis insisted that doctors wash their hands before examinations, and the death rate immediately dropped to 2 percent. Look at the specific instructions God gave His people for when they encounter disease: "And when he that has an issue is cleansed of his issue; then he shall number to himself even days for his cleansing, and wash his clothes, and bathe his flesh in running water, and shall be clean" (Leviticus 15:13). Until recent years, doctors washed their hands in a bowl of water, leaving invisible germs on their hands. However, the Bible says specifically to wash hands under "running water."