Excerpt from Washington Health Rules
Sanitarians realize that the success of the campaign for the prevention of any disease must depend to a great extent upon the education of the public as regards the specific cause of the disease; the channels by which it gains access to the human body (infection); the prevention of infection; and the measures by which the development of the disease may be prevented or arrested in those already infected.
It is a well-established fact that an attack, for instance, of tuberculosis, in any of its forms, depends upon two factors; first, the introduction of the germ (tubercle bacillus); second, the susceptibility of the individual. There can be no tuberculosis in the absence of the germ, and the introduction of the germ into the body of an immune individual will not give rise to an attack of tuberculosis. Fortunately, adults, in a good state of health, have very little susceptibility to the disease. The susceptibility of children is much greater. But a majority of those who are infected in childhood, by association with persons suffering from pulmonary tuberculosis, do not become victims of the disease. Still the number who do contract tuberculosis, in one form or another, is very great, and, as is well known, this disease is the leading factor in our mortality statistics. The fact that infection usually occurs in childhood is now well established.
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