Tuberculosis (TB) was historically called "consumption" due to the dramatic weight loss and wasting away experienced by patients. The modern name "tuberculosis" was first published by J. L. Schönlein in 1832. Today, between 3% and 5% of the U.S. population are estimated to be living with latent TB infection. Contrast that with the worldwide statistics which state that nearly one fourth of the world population has TB infection. In some countries in sub-Saharan Africa and Asia, the annual incidence is several hundred per 100,000 population. In the US, the annual incidence is