This formula goes back to the 15th Century during the Plague. Story goes 4 thieves would douse their cloths with this blend then venture out to rob the victims of the plague. A blend of eucalyptus, rosemary, cinnamon, clove and lemon creating a fusion which is anti-bacterial, anti-viral, antiseptic and anti catarrh properties while stimulating the immune system, circulation and the respiratory system. According to research at Weber State University, this blend was found to have a 99% kill rate against airborne bacteria when diffused.