The Immunity Shield blend is a combination of immune boosting essential oils that may help to cleanse the air of viruses, toxins, bacteria and air pollutants. Use in a diffuser or oil burner to cleanse the air and help protect the body from illness or disease. All oils in the Immunity Shield blend are 100% certified organic and include Clove Bud, Lemon, Cinnamon Leaf, Blue Mallee, Tea Tree and Rosemary. The Immunity Shield blend is hand crafted in Australia. Interestingly, Clove bud, Cinnamon and Lemon essential oils were 3 of the key ingredients in the infamous Four Thieves Oil Blend that came from the long-told historic tale of four thieves during the 15th century plague who used these oils to protect themselves from the raging diseases of that time.