???? The inability of bacteria, by themselves, to create diseases is further confirmed by the well-known facts of natural immunity to specific infection or contagion. All mankind is more or less affected by hereditary and acquired disease taints, morbid encumbrances and drug poisoning, resulting from age-long violation of Nature?s Laws and from the suppression of acute diseases; but even under the almost universal present conditions of lowered vitality, morbid heredity and physical and mental degeneration it is found that under identical conditions of exposure to drafts or infection, a certain percentage of individuals only will take the cold or catch the disease. The fact of natural immunity is constantly confirmed by common experience as well as in the clinics and laboratories of our medical schools and research institutes. Of a specific number of mice or rabbits inoculated with particles of cancer, only a small percentage develops the malignant growth and succumbs to its ravages.







