Four Thieves Blend was utilized during the Bubonic Plague. Theives who sought out to rob the dead of their earthly treasures would utilize this recipe to protect themselves against the looming plague. I have put it in a travel sized form so you can take it on the go. Use it to disinfect surfaces, the air, yourself; whatever you please. It's great for door handles, grocery carts, your toothbrush, and more!