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The propriety or impropriety of the marriage of persons affected with tuberculosis depends largely on the influence of heredity in the production of the disease. The factor of heredity has been discounted to a considerable degree since Koch, in 1882, discovered the true nature of the disease. Since then more and more importance has been attached to the element of communicability. Possibly the pendulum of thought has gone a little too far in this regard and too much emphasis has been laid on the contagious nature of the malady and too little on heredity as the predisposing cause.
THE FACTOR OF HEREDITY.
It is well that the equilibrium be maintained in the battle now being waged against the plague, and that none of the causative influences be overlooked. After admitting all that has been said and written in regard to contagion and environment, we are still forced to recognize heredity,
McSWAIN IA. MARRIAGE AND INTERMARRIAGE OF TUBERCULOUS SUBJECTS. JAMA. 1908;L(25):2057–2059. doi:10.1001/jama.1908.25310510025002b
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