A cold and flu preventative, this antibacterial spray contains many essential oils that have bee used historically used for a variety of infections and diseases. In the Middle Ages, sprigs of Thyme were carried by judges in their courtrooms, to ward off infection from all the people that they dealt with on a daily basis. The Australian Aborigines used the leaves of the Tea Tree Plant to cure infected wounds. This idea was adopted by the military, and in World War II, Tea Tree was included in first aid kits. To shorten the duration of someone's illness, spray Immune periodically in the room where they are ill.