Certified Homeoprophylaxis Supervision (HP) and Travel HP is a method of immune system education by which an infectious agent in homeopathic dilution is administered to elicit an immune response. In HP, an immune system response is created by the homeopathic nosode and results in the same process of learning for the immune system that a natural disease would, thereby educating a child’s immune system so as to reduce infectious contagious disease. Because of the homeopathic dilution, the immune system response to an HP nosode will always be mild and short-lived, and leave no permanent damage, only learning, resulting in a stronger, healthier immune system. View a wonderful, short video here to learn more about HP.