- ... that one third of the world's current population has tuberculosis (see map shown on the right), and new infections occur at a rate of one per second?
- ... that shortness of breath that is worse when sitting up is called platypnea, which is a sign of hepatopulmonary syndrome?
- ... that obesity increases the risk of cardiovascular diseases, diabetes mellitus type 2, sleep apnea, certain types of cancer, and osteoarthritis, and shortens life expectancy?
