TB, or TUBERCULOSIS, is a disease caused by infection by a germ known as the “tubercle bacillus.” It is, unfortunately, a common infection in all parts of the world, and is most common where people live in crowded, unsanitary conditions and have poor nutrition.

Luckily, man has strong resistance to the infection. About 90 per cent of the people who live in cities develop at least a small spot of infection at some time or other, but most do not even know they have it. Less than 10 per cent of people infected with TB die of it.