Dr. Isaac Goiz Durán, a Mexican physician, first discovered the principles behind biomagnetic therapy more than 20 years ago when treating an AIDS patient. After putting two magnets, one on the rectum and the other on the thymus gland, the patient recovered shortly. Dr. Durán proposed that this pair of points have a relationship to each other for harboring the pathogens that cause AIDS: the HIV virus in the rectum and Escherichia coli in the thymus gland. What makes it possible for these two pathogens to survive in these niches is the alteration of the local pH values: the virus relishes an acid environment while the bacteria an alkaline one. Furthermore, according to Dr. Durán, these two pathogens resonate with each other and cause the collapse of the immune system. By placing simple magnets on these two places, the local pH is neutralized, causing the pathogens to be immediately eliminated. In the case of AIDS, one would place the positive end of the magnet on the thymus and the negative end on the rectum. Dr. Durán calls this bi-focal relation between these two disease-causing points of the body the "biomagnetic-pair." In the years that followed, Dr. Durán and his adepts discovered hundreds of such pairs relating to most diseases inflicting humankind, including scourges such as cancer and hepatitis. By presenting this catalogue of pairs, Dr. Durán claims that most of these diseases can be cured by this simple method of placing these magnets in pairs.