Tuberculosis is a germ infection, but it practically never gets hold upon a human body except when the body is reduced by undernourishment and lack of fresh air.
"The Book of Life: Vol. I Mind and Body; Vol. II Love and Society"
Upton Sinclair
Because free meals are given at school to cure and prevent undernourishment, it is taken for granted that undernourishment stops when free meals are introduced; therefore America must have free meals.
"Civics and Health"
William H. Allen
While too little food might cause this condition, it was also explained that too much food of the wrong sort, or even food of the right sort eaten irregularly or hurriedly or poisoned by bad teeth, might also cause undernourishment, including the extreme type known as malnutrition.
"Civics and Health"
William H. Allen