Immunity may be the result, according to other theories, of a positive factor due to the presence of antibodies which neutralize the toxins. In some cases immunity is associated directly with cell activity while in others it is resident in the blood and fluids of the body. Rosenau further says, “The unsatisfactory state of our knowledge in certain fields of immunity is well illustrated in the case of anthrax. The mechanism of protection is not at all understood in this infection, which was the first and classic illustration of a germ dis-ease. The mechanism of immunity in common colds is also complex and obscure.” Many other authors could be quoted to show that the real philosophy of immunity is not understood nor why a germ will seem to cause dis-ease in one individual and not in another. But this is sufficient to indicate the unsatisfactory results that have been obtained in research work along this line. Adaptability of the Body It is a known fact that there is a wide range of adaptability and a vast difference in the vital resistance of different individuals, and even in the same individual at different times. There must be some reason for this difference. It is also a known fact that an individual may be apparently well one day and sick the next, although there may be no change in the subluxations existing in the spine of the individual. Environmental conditions are constantly arising which necessitate adaptative action on the part of Innate Intelligence. This action must be in addition to the normal action taking place under the normal and usual environments. In order to accomplish this increased functional activity the current must be increased to accomplish this, the carrying capacity of the nerve must be greater than the current necessary to maintain the ordinary metabolic process in the body. Under the stress of environmental necessity it is possible for Innate Intelligence to increase the functional current of mental impulses up to the full carrying capacity of the nerve, and to augment the functional activity at the periphery to the full capability of the physical structure to express that current of mental impulses. Were it not for this possibility of increased functional activity there could be no adaptative processes in the body. In order that there may be an increase in the functional activity there must be an increase in the functional current of mental impulses. This necessitates that the current transmitted under normal conditions be less than the carrying capacity of the nerve.